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!