Well, it's spoiler time once again and it looks like Oath of the Gatewatch is going to be pretty good to my Type 4 Stack

Kozilek, the Great Distortion   CC (using these until we get a proper colorless mana symbol tag
Legendary Creature - Eldrazi
When you cast Kozilek, the Great Distortion, if you have fewer than seven cards in hand, draw cards equal to the difference.
Menace
Discard a card with converted mana cost X: Counter target spell with converted mana cost X.
12/12

Solid threat right out of the gate!  I imagine this is going to take some doing to take down!

Endbringer   C
Creature -Eldrazi
Untap Endbringer during each other player's untap step.
: Endbringer deals 1 damage to target creature or player.
C,  : Target creature can't attack or block this turn.
CC,  : Draw a card.
5/5

Solid board control/card advantage, although it requires you to be able to untap with it or give it haste.  Still, the payoff seems big enough to give it a shot.

Sphinx of the Final Word  
Creature - Sphinx
Sphinx of the Final Word can't be countered.
Flying, hexproof
Instant and sorcery spells you control can't be countered by spells or abilities.
5/5

Man!  This set is all about big scary beaters so far!  Like Kozilek, really tough to deal with, which I find is sort of a requirement for creatures who just beat face these days.  Protecting all your other spells for counters just put him over the top!

World Breaker  
Creature - Eldrazi
Devoid
When you cast World Breaker, exile target artifact, enchantment, or land.
Reach
{2}C, Sacrifice a land: Return World Breaker from your graveyard to your hand.
5/7

This seems like a hell of a replacement for Acidic Slime if you've still got him in your stack.  I don't think the recursion is going to trigger that often, but it's not totally irrelevant.

Mindmelter  
Creature - Eldrazi Drone
Devoid
Mindmelter can't be blocked.
{3}C: Target opponent exiles a card from his or her hand. Activate this ability only any time you could cast a sorcery.
2/2

Might actually be too strong, but I want to give it a try anyway.  The saving grace being how easy the little bugger is to kill, but if it sticks around for any length of time, he just ruins everyone else's hands.  

Reflector Mage  
Creature- Human Wizard
When Reflector Mage enters the battlefield, return target creature an opponent controls to its owner's hand. That creature's owner can't cast spells with the same name as that creature until your next turn.
2/3

A nice utility dude with a unique take on a classic comes into play trigger.  Worth trying out at least.

Mirrorpool
Land
Mirrorpool enters the battlefield tapped.
: Add C to your mana pool.
{2}C,  , Sacrifice Mirrorpool: Copy target instant or sorcery spell you control. You may choose new targets for the copy.
{4}C,  , Sacrifice Mirrorpool: Put a token onto the battlefield that's a copy of target creature you control.

Finally!  A non-creature!  This will probably sit on the board for a while just waiting, but when it goes off it ought to be brutal!  The fact that it doesn't take up a spell for the turn and is so versatile makes this one a definite inclusion in my stack!

New Commander Product!  Figured I'd list some of what I see as Type 4 stack additions, seeing as no one put anything up for BfZ (I just added Void Winnower, Scour from Existence, Brutal Expulusion, Ulamog, and Desolation Twin).

Kalemne's Captain   
Creature -Giant Soldier
Vigilance
: Monstrosity 3
When Kalemne's Captain becomes monstrous, exile all artifact and enchantments.
5/5

Solid beater and good mass artifact and enchantment control.  All around good utility guy and the vigilance and exile are nice extra touches.

Æthersnatch 
Instant
Gain control of target spell. You may choose new targets for it.

I already run Commandeer and this seems better.  I'll still probably run both though, since the other can potentially not eat up my spell for the turn.

Deadly Tempest   
Sorcery
Destroy all creatures.  Each player looses life equal to the number of creatures he or she controlled that were destroyed this way.

Yet another Wrath.  I'll have to check to see how this compares to my others, but maybe.

Mizzix's Mastery   
Sorcery
Exile target card that's an instant or sorcery from your graveyard.  For each card copied this way, copy it, and you may cast the copy without paying it's mana cost.  Exile Mizzix's Mastery.
Overload 

Finally!  A Recoup/Past in Flames I can play!  I've been toying around with Sins of the Past, but it usually underwhelms.  This seem WAY better!

Blade of Selves 
Artifact - Equipment
Equipped creature has myriad
Equip 

This seems fantastic!  While I'm usually hesitant about any cards in my stack that don't do anything by themselves, this seems powerful/easy enough to use to be worth it.

Definitely seen a few more cards that'll be making their way into my stack.

Hidden Dragonslayer  
Creature - Human Warrior
Lifelink
Megamorph  
When Hidden Dragonslayer is turned face up, destroy target creature with a power of 4 or greater an opponent controls.
2/1

Yet another solid morph dude that can gain you some extra life.

Clone Legion  
Sorcery
For each creature target player controls, put a token onto the battlefield that's a copy of that creature.

I LOVE this card!  Even though it'll probably just copy one or two guys most times, it still seems crazy good in Type 4.  Incidently, it doesn't target, so you can copy their shroud and hexproof guys as well!

Stratus Dancer  
Creature - Djinn Monk
Flying
Megamorph  
When Stratus Dancer is truned face up, counter target instant or sorcery spell
2/1

Morph based counters are always welcome.  They don't cost you a card or your speel or the turn, AND they can counter split second cards, which is always helpful.

Sidisi, Undead Vizier  
Legendary Creature - Zombie Naga
Deathtouch
Exploit
When Sidisi, Undead Vizier exploits a creature, you may search your library for a card, put it in you hand, and shuffle you library.
4/6

Probably worse than Rune-Scarred Demon here, but the effect is solid and the sac outlet can be handy.

Silumgar Assassin  
Creature - Human Assassin
Creatures with power greater the Silumgar Assassin can't block it.
Megamorph  
When Silumgar Assassin is turned face up, destroy target creature with power of 3 or less an opponent controls.
2/1

Generally not as useful as Hidden Dragonslayer, he can still pick off pesky utility dorks.  I plan to try this out if I can find a spot.

Ainok Survivalist  
Creature - Hound Shaman
Megamorph  
When Ainok Survivalist is turned face up, destroy target artifact or enchantment an opponent controls.
2/1

I already run Nantuko Vigilante, but I may replace it with this since I also run Viral Drake and this gives that more stuff to proliferate.

Den Protector  
Creature- Human Warrior
Creatures with power less than Den Protector's can't block it.
Megamorph  
When Den Protector is turned ace up, return target card in your graveyard to your hand.
2/1

The face down hits keep rolling in!  This is an awesome surprise effect I can't wait to use!

Dragonlord Dromoka  
Legendary Creature - Elder Dragon
Dragonlord Dromoka cannot be countered.
Flying, lifelink
Your opponents can't cast spells during your turn.
5/7

REALLY solid beater!  Between the lifelink and shutting down your opponents' ability to react to (or counter) stuff on your turn, this dragon demands a quick answer!

Dragonlord Silumgar  
Legendary Creature - Elder Dragon
Flying, deathtouch
When Dragonlord Silumgar enters the battlefield, gain control of target creature or planeswalker for as long as youcontrol Dragonlord Silumgar.
3/5

This one's a bit less durable than the last, but the ability to take an opposing creature is a good one!  While less common, the three planeswalkers I run (Bolas, Karn, and Ugin) all make similarly fine targets.  It'll take a bit of effort to get the most out of him, as he is still just a fragile creature, but I like him.

Narset Transcendant  
Planeswalker - Narset
+1: Look at the top card of your library.  If it's a noncreature, nonland card, you may reveal it and put it into your hand.
-2: When you cast your next instant or sorcery spell from your hand this turn, it gains rebound.
-9: You get an emblem with "Your opponents can't cast noncreature spells."
6
 
I really want to like this card, but I feel like it's the same trap I fell for when Cast Through Time was printed, it does basically nothing on it's own.  Still, handing out rebound is so appealing I want to try it.

Silumgar's Command  
Instant
Choose two —
• Counter target noncreature spell.
• Return target permanent to its owner's hand.
• Target creature gets -3/-3 until end of turn.
• Destroy target planeswalker.

The other good command (though Kolaghan's might be ok).  This one will usually be a psudeo Cryptic Command, though one could do a lot worse than that!

Not a ton of cards I'll be adding to my stack, but the ones that are going in seem like good ones!  I really like the manifest mechanic in particular and the way it can play with morph.

In no particular order I'll definitely be adding:
Ugin
Soulfire Grand Master
Reality Shift (really interesting removal option)
Suppliant Form

And maybe:
Rally the Ancestors
Ethereal Ambush (Potential nasty surprise and, if nothing else, two 2/2s at instant speed that keep your opponents guessing isn't terrible)
Tasigur
Ghastly Conscription
Soulflayer (I'm a sucker for possible mix and match monsters and this one has a better possible array of abilities the Cairn Wanderer)
Crux of Fate (probably not, but I'll be checking to see if this is better than any of my current wraths)

So I'm starting to see some new possible additions to my stack in the upcoming Commander product.

Angel of the Dire Hour     
Creature- Angel
Flash
Flying
When Angel of the Dire Hour enters the battlefield, if you cast it from your hand, exile all attacking creatures.
5/4

Great combat trick and big flyers with flash are always worth at least taking a look at, I think.

Malicious Affliction 
Instant
Morbid — When you cast Malicious Affliction, if a creature died this turn, you may copy Malicious Affliction and may choose a new target for the copy.
Destroy target nonblack creature.

Solid removal with the potential for card advantage.

Necromantic Selection     
Sorcery
Destroy all creatures, then return a creature card put into a graveyard this way to the battlefield under your control. It's a black Zombie in addition to its other colors and types. Exile Necromantic Selection.

Hell of a boardwipe!  I like that the creature you get back doesn't have to be one of yours so you can use it as a Control Magic as well if you don't care about pissing off the whole table.

Overseer of the Damned   
Creature - Demon
Flying
When Overseer of the Damned enters the battlefield, you may destroy target creature.
Whenever a nontoken creature an opponent controls dies, put a 2/2 black Zombie creature token onto the battlefield tapped.
5/5

Another good etb creature with a bonus ability to boot!  I only recent cut Dark Hatchling out of my stack and I'm guessing if there is still anyone left playing him, that ends now.

Dualcaster Mage   
Creature- Human Wizard
Flash
When Dualcaster Mage enters the battlefield, copy target instant or sorcery spell. You may choose new targets for the copy.
2/2

Holy pushed cards, Batman!  I really want to add this guy, as Fork may not be playable on it's own, but putting it on a creature opens up so many possibilities.

A couple more goodies to add to stacks everywhere:

Clever Impersonator     
Creature - Shapeshifter
You have may Clever Impersonator enter the battlefield as a copy of any nonland permanent on the battlefield.
0/0

The single most versatile clone ever!  This is replacing Phyrexian Metamorph in my stack ASAP!

Jeering Instigator   
Creature - Goblin Rogue
Morph 
When Jeering Instigator is turned face up, if it's your turn, gain control of another target creature until end of turn. Untap it. That creature gains haste until end of turn.
2/1

Another really solid morph.  I'm just glad to see more playable morphs!  I've been hesitant to cut some of the weaker morphs in my stack for fear of weakening the guessing game factor, but now I can actually take a look at some of them since Ive got possible replacements (or additions)!

Oh snap!

Kheru Spellthief   
Creature- Naga Wizard

Morph 
When Kheru Spellthief is turned face up, counter target spell. If that spell is countered this way, exile it instead of putting it into its owner's graveyard. You may cast that card without paying its mana cost as long as it remains exiled.
3/3

Spelljack morph!  This is absolutely going in my stack!  On top of just being an awesome morph, it's also another answer to split second!

Haven't seen anyone else bring this up, so I figured I'd  post some of the spoilers thus far that have caught my eye for Type 4.

Hypnotic Siren     
Enchantment Creature- Siren
Bestow 5UU
Flying
You control enchanted creature.
Enchanted creature gets +1/+1 and has flying.
1/1

Another solid Control Magic effect and this one even leaves behind a chump blocker after the creature dies!

Polumorphus Rush   
Instant
Strive — Polymorphous Rush costs  more to cast for each target beyond the first.
Choose a creature on the battlefield. Any number of target creatures you control each become a copy of that creature until end of turn.

I keep trying to get Mirrorweave to work in my stack but it's usually too situational.  This one gives you more control over the effect, so it seems like it may work better.

Silence the Belivers   
Instant
Strive — Silence the Believers costs 2B more to cast for each target beyond the first.
Exile any number of target creatures and all Auras attached to them.

An instant speed, exiling Plague Wind!  I realize that this isn't quite that, but it's close enough for me!

Worst Fears     
Sorcery
You control target player during that player's next turn. Exile Worst Fears.

Haven't decided if this is going to replace Mindslaver (It's been a little too easy to recur sometimes) in my stack, or just be an extra effect, but I still want to try it.

Bearer of the Heavens   
Creature--Giant
When Bearer of the Heavens dies, destroy all permanents at the beginning of the next end step.
10/10

On the fence about this guy, but he seems like he'd be a really good beatdown guy that makes your opponents hesitant about killing it.  Then again, he might just have a huge target on his head from the guy who has little board presence.

Love this guy:

Chromanticore      
Enchantment Creature — Manticore
Bestow  
Flying, first strike, vigilance, trample, lifelink
Enchanted creature gets +4/+4 and has flying, first strike, vigilance, trample and lifelink.
4/4

Makes any creature on you side bananas and sticks around after it dies.  Best Bestow card I've seen yet!


Less sure about this one, but should be solid at least in newer stacks:

Tromokratis      
Legendary Creature — Kraken    
Tromokratis has hexproof unless it's attacking or blocking.
Tromokratis can't be blocked unless all creatures defending player controls block it. (If any creature that player controls doesn't block this creature, it can't be blocked.)
8/8

A solid beater with interesting protection.  I won't go out of my way to acquire him, but I may give him a shot.

Here's a few more I really like:

Shipbreaker Kraken   
Creature — Kraken    
6{U}{U}: Monstrosity 4.
When Shipbreaker Kraken becomes monstrous, tap up to four target creatures. Those creatures don't untap during their controllers' untap steps for as long as you control Shipbreaker Kraken.
6/6

A 10/10 that clears out blockers and demands an answer.  If you tap down something scary, like a Blightsteel, you might even get opponents to help protect it!

Voyage's End     
Instant    
Return target creature to its owner's hand. Scry 1.

A nice utility spell with loads of tempo.  Not really sure if this can make it in my stack, but I like to try and find spots for solid role players like this.  Great for beginner stacks!

Medomai the Ageless   
Legendary Creature — Sphinx
Flying
Whenever Medomai the Ageless deals combat damage to a player, take an extra turn after this one.
Medomai can't attack during extra turns.
4/3

Powerful effect, but I've found that creatures like this really require a lot of protection as they usually die before the connect.  That ability though...

Underworld Cerberus   
Creature — Hound
Underworld Cerberus can't be blocked except by three or more creatures.
Cards in graveyards can't be the targets of spells or abilities.
When Underworld Cerberus dies, exile it and each player returns all creature cards from his or her graveyard to his or her hand.
6/6

Very cool card!  Not really sure about whether he makes the cut or not, but the abilities all look so interesting the I want to at least give him a shot.

Curse of the Swine       
Sorcery    
Exile X target creatures. For each creature exiled this way, its controller puts a 2/2 green Boar creature token onto the battlefield.

Very funny card!  Come on, man, they all turn into pigs!  Plus, it's a multi-targeted removal spell, in a color almost nothing's got protection from, and it exiles!  Shame about the sorcery speed though.

Lord of the Void looks pretty good, as long as he can actually get through.  In my stack, that is a huge if as there is a fair amount of removal.  Still, if I get my hands on one, I definitely try it.  One card I know I'm going to play is:

Sepulchral Primordial     
Creature - Avatar    
Intimidate
When Sepulchral Primordial enters the battlefield, for each opponent, you may put up to one target creature card from that player's graveyard onto the battlefield under your control.
5/4

Fantastic late game play!  Lets you pick up the best creature from each graveyard and has a decent sized evasive body of its own.  Makes me wanna try this guy too:

Luminate Primordial     
Creature - Avatar    
Vigilance
When Luminate Primordial enters the battlefield, for each opponent, exile up to one target creature that player controls and that player gains life equal to its power.
4/7

Swords on a stick is really solid.  I just worry that the creatures are too big in this format and it will be too much life to be giving all of my opponents.

Love this one and am going to need one for my stack as well as a couple of EDH decks:

Stolen Identity         
Sorcery
Put a token onto the battlefield that's a copy of target creature or artifact.
Cipher

Depending on how often creatures get though in your stack, this can be like a better version of Phyrexian Metamorph (which sees play in mine).  Yes it turns whatever creature it is encoded onto a target, but if it even gets through once, that's pretty solid.

Absolutely going to be playing this guy!

Lazav, Dimir Mastermind     
Creature- Shapeshifter
Hexproof
Whenever a creature card is put into an opponent's graveyard from anywhere, you may have Lazav, Dimir Mastermind become a copy of that card except it's name is still Lazav, Dimir Mastermind, it's legendary in addition to it's other types, and it gains hexproof and this ability.
3/3

Creatures die a lot in my stack, and the fact that even things like countermagic trigger this guy just makes him al the better.  Infact he's even pretty good with:

Skarrg Goliath   
Creature- Beast
Trample
Bloodrush - 5{G}{G}, Discard Skarrg Goliath: Target attacking creature gets +9/+9 and gains trample until end of turn.
9/9

Solid combat trick for stacks looking for that sort of thing.  Not sure if this will quite cut it in mine, but a definite inclusion for a newer stack.

Hellkite Tyrant   
Creature- Dragon
Flying, trample
Whenever Hellkite Tyrant deals combat damage to a player, gain control of all artifacts that player controls.
At the beginning of your upkeep, if you control twenty or more artifacts, you win the game.
6/6

Another iffy one, just because he needs to connect to have an effect, but man is it a good one.  I will likely end up giving him a try as I have a minor dragon subtheme with Scion of the Ur-Dragon and Imperial Hellkite in my stack. 

Deathpact Angel   
Creature- Angel
Flying
When Deathpact Angel dies, put a 1/1 white and black Cleric creature token onto the battlefield. It has "3{W}{B}{B}, , Sacrifice this creature: Return a card named Deathpact Angel from your graveyard to the battlefield."
5/5

Probably the weakest inclusion here, since it's just a weaker Sengir Nosferateu (and that didn't even get to stay in my stack), but I'm just a sucker for weird token producers and I want to at least try and see if this one works out better.

Uh, so this seems amazing...

Spelltwine     
Sorcery
Exile target instant or sorcery card from your graveyard and target instant or sorcery from your opponent's graveyard. Copy those cards. Cast the copies if able without paying their mana cost. Exile Spelltwine.

A couple of cards for those of us with an ACC rule:

Mindclaw Shaman          
Creature - Viashino Shaman    
When Mindclaw Shaman enters the battlefield, target opponent reveals his or her hand. You may cast an instant or sorcery card from it without paying its mana cost.
2/2

Solid dude for most stacks I'd say.

Omniscience                      
Enchantment    
You may cast nonland cards from your hand without paying their mana costs.

AKA, "Hey everybody!  Please all gang up on me right now!"  The scary thing is, even with that happening, I still think you have a solid chance of winning if this sticks and you have a decent hand.

Couple of others that look pretty good to me:

Silent-Blade Oni           
Creature - Demon Ninja
Ninjutsu 
Whenever Silent-Blade Oni deals combat damage to a player, look at that player's hand. You may cast a nonland card in it without paying that card's mana cost.
6/5

Another ninja to join Ink-Eyes in my stack!  This one looks even better as it will almost always have a target and can lead to some devastating plays.  Sucks without the ACC rule though.

Dragonlair Spider           
Creature - Spider    
Reach
Whenever an opponent casts a spell, put a 1/1 green Insect creature token onto the battlefield.
5/6

Less great, but can still put out a sizeable army of chumps if left unmolested.

Vela the Night-Clad         
Legendary Creature - Human Wizard    
Intimidate
Other creatures you control have intimidate.
Whenever Vela the Night-Clad or another creature you control leaves the battlefield, each opponent loses 1 life.
4/4

Definitely the least powerful of the three, but still gives your other dudes evasion and can punish someone for wrathing.

Seems like this could be an interesting addition to some stacks:

Mikaeus, the Unhallowed         
Legendary Creature -- Zombie Cleric
Intimidate
When a Human deals damage to you, destroy it.
Other non-Human creatures you control get +1/+1 and have undying.
5/5

My Type 4 stack seems to have a fairly even split between Humans and non-Humans, adding an interesting new dynamic to things with this guy.  I like cards that care about something new in my stack.  Still, he needs some way to be protected in order to work.

Well geez, they sure saved all the good T4 stuff for the end!

Back from the Brink     
Enchantment
Exile a creature from your graveyard and pay it's mana cost:  Put a token onto the battlefield that's a copy of that card.  Activate this ability only anytime you could cast a sorcery.

I like this as a potentially good late-game effect.  Like a worse but one-sided Twilight's Call.

Lost in the Mist       
Instant
Counter target spell.  Return target permanent to it owner's hand.

It's like a half a Cryptic Command!  Hell yeah this is going in my stack!

Runic Repetition     
Sorcery
Return target exiled card with flashback to your hand.

Narrow but pretty powerful effect.  I'll have to look to see how much flashback I play to see if this makes it.

Sever the Bloodline   
Sorcery
Exile target creature and all other creatures with the same name as that creature.
Flashback

The sorcery speed sucks on this one, but it might still be worth it as it is the only targeted creature removal I know with flashback. It even occasionally has some extra oomph against tokens and Clone effects.

Tribute to Hunger     
Instant
Target opponent sacrifices a creature.  You gain life equal to that creature's toughness.

Yay!  Better Edict!

Desperate Ravings     
Instant
Draw two cards, then discard a card at random.
Flashback   

Eh...maybe?  Flashback card draw could be good.

Evil Twin       
Creature - Shapeshifter
You may have Evil Twin enter the battlefield as a copy of any creature on the battlefield except it gains " : Destroy target creature with the same name as this creature."
0/0

Will probably usually be just a Clone, but the extra option to kill the original is always nice.

Finally some decent cards with flashback:

Creeping Renaissance    
Sorcery    
Choose a permanent type. Return all cards of the chosen type from your graveyard to your hand.
Flashback  

Super Regrowth with flashback?  Yes, please!

Unburial Rites        
Sorcery    
Return target creature card from your graveyard to the battlefield.
Flashback  

A so-so reanimation effect, but the flashback could make it worth it.

Not a whole lot of T4 playables in this set thus far, but this one is neat:

Army of the Damned    

Sorcery
Put thirteen 2/2 black Zombie creature tokens onto the battlefield tapped
Flashback  

For stacks that use Crush of Wurms, this at least provides a different option.  Though Storm Herd is still probably better, I'm starting to get a little sick of that card to be honest.

This guy seems like a solid possibility:

Reaper from the Abyss         

Creature - Demon
Flying
Morbid- At the beginning of each end step, if a creature died this turn, destroy target non-Demon creature.
6/6

Creatures do tend to die pretty often, and I imagine that if this guy manages to stick around for any length of time, he will certainly accelerate the process!  Plus he has a decent body and he's big and black and therefore immune to some removal as well.

And the hits keep coming!

Sphinx of Uthuun       
Creature - Sphinx    
Flying
When Sphinx of Uthuun enters the battlefield, reveal the top five cards of your library. An opponent separates those cards into two piles. Put one pile into your hand and the other into your graveyard.
5/6

I really hope there is a cycle of these guys! 

Here's the first card I've really liked for Type 4 (though I love Scrambleverse for my Chaos Effect Stack):

Rune-Scarred Demon   
Creature - Demon
Flying
When Rune-Scarred Demon enters the battlefield, search your library for a card, put it into your hand, then shuffle your library.
6/6

Good ability on a solid body.  Great with Karmic Guide, Artisan of Kozilek, and Clone effects.  Ridiculous with Kiki-Jiki!

Last of the spoiler's up at MTGSalvation, and there's a few last cards that I like for Type 4:

Tribute to the Wild    
Instant    
Each opponent sacrifices an artifact or enchantment.

Nice Edict for artifacts and enchantments.  Reminds me of Fracturing Gust minus the lifegain.

Scavenging Ooze    
Creature - Ooze    
: Exile target card from a graveyard. If it was a creature card, put a +1/+1 counter on Scavenging Ooze and you gain 1 life.
2/2

A really solid grave-hate option.  I'd say a direct upgrade over Withered Wretch if anyone still plays him (and not quite as absurd as Creakwood Ghoul has proven in my stack)

A bunch of new cards just spoiled here: http://forums.mtgsalvation.com/showthread.php?t=329854

And a few I think are pretty good in Type 4.

Riku of Two Reflections   
Legendary Creature - Human Wizard
Whenever you cast an instant or sorcery spell, you may pay  . If you do, copy that spell. You may choose new targets for the copy.
Whenever another nontoken creature enters the battlefield under your control, you may pay  . If you do, put a token that's a copy of that creature onto the battlefield.
2/2

He's like a half fair Mischievous Quanar/half better Minion Reflector.  I definitely like him.

Spell Crumple     
Instant
Counter target spell. If that spell is countered this way, put it on the bottom of its owner's library instead of into that player's graveyard. Put Spell Crumple on the bottom of it's owners library.

Hooray!  Another great counterspell.  With all the reshuffling effects in most stacks, this may even have a chance to show up again!

Soul Snare       
Enchantment
, Sacrifice Soul Snare: Exile target creature that's attacking you or a planeswalker you control.

A nice rattlesnake card.  Better for low powered stacks, but a fun addition nonetheless.

Chaos Warp     
Instant
The owner of target permanent shuffles it into his or her library, then reveals the top card of his or her library. If it's a permanent card, he or she puts it onto the battlefield.

A decent removal spell that's also a mini-Warp World.  I already play Reweave n my stack, so I'll enjoy this guy too.

Yeah, Damia is definitely legendary.  I just copy and pasted it from the MTGSalvation spoiler and didn't even notice that it wasn't listed as such.

Here's a guy that will be replacing Reiver Demon in my stack (which is a shame since I love the art):

Dread Cacodemon     
Creature - Demon
When Dread Cacodemon enters the battlefield, if you cast it from your hand, destroy all creatures you opponents control, then tap all other creatures you control.
8/8

I love this next one too (though I've tended to overestimate sorcery speed removal before)

Syphon Flesh   
Sorcery
Each other player sacrifices a creature.  Then put a 2/2 black Zombie creature token onto the battlefield for each creature sacrificed this way.

Nice little psudeo-Wrath that can give you a little army too.

Damia, Sage of Stone   
Creature - Gorgon Wizard
Deathtouch
Skip your draw step.
At the beginning of your upkeep, if you have fewer than seven cards in hand, draw cards equal to the difference.
4/4

Seems like she could be good if she lives.  I think she'll be good in lower powered stacks.

Avatar of Slaughter   
Creature - Avatar
All creatures have double strike and attack each turn if able.
8/8

Like this guy a lot if your stack has a lot of creatures for the aggression it encourages.

Now that's what I'm talkin' about!

The Mimeoplasm           

Legendary Creature - Ooze    

As The Mimeoplasm enters the battlefield, you may exile two creature cards from graveyards. If you do, it enters the battlefield as a copy of one of those cards with a number of additional +1/+1 counters on it equal to the power of the other card.
0/0

This guy is pretty much a better in almost all cases version of Body Double and if definitely going in my stack!

Honestly, I haven't seen anything too exciting for Type 4 just yet. 

Karador is pretty good, but the way I play the ACC rule in my stack, it counts as your spell for the turn if you used any "Type 4 Mana" to cast it, so the dead creature would still count as your spell for the turn.

Also, remember that Nin is a potential one-shot kill, and a lot of groups dislike that.  If it is ok with your group, then she could be pretty cool, as she's still fairly fragile but the ability is actually interesting.  Ultimately though, she'll likely just play out as another "kill this now or you die" card.

Vish Kal feels like just another big dumb beater to me with an occasionally useful sac ability, but Edric seems like he could have really interesting political implications.  Unfortunately, he's just a puny 2/2.

I really hope some more exciting stuff comes out of these for Type 4 as the above all feel a bit "meh" to me. 

I think this makes another solid additon, possibly supplanting Duplicant:

Phyrexian Ingester   

Creature - Beast    

Imprint - When Phyrexian Ingester enters the battlefield, you may exile target nontoken creature.
Phyrexian Ingester gets +X/+Y, where X is the exiled creature card's power and Y is its toughness.

3/3

And if anyone still plays Clone (like me) or Sculpting Steel, you could replace it with this:

Phyrexian Metamorph   {pu}
Artifact Creature - Shapeshifter    

({PU} can be paid with either or 2 life.)
You may have Phyrexian Metamorph enter the battlefield as a copy of any artifact or creature on the battlefield, except it's an artifact in addition to its other types.

0/0

Also, I kinda love Viral Drake.  I've been looking for some reason to put Proliferate in my stack and he seems like the perfect candidate.  Plenty scary on its own, and some cool interactions here and there.  It is a shame there wasn't somewhere between too weak and degenerate for Proliferate in T4 since infinite activations seems crazy, but I still look forward to giving him a shot.  He can even be used to save Planeswalkers from any amount of damage at instant speed!