I've been taking TnT to the local T1; but this week it was time to change up a bit. There had been an interesting discussion on this board about using Power Artifact to give Keeper another plan of attack and a really wild sideboard idea out of the big tournament in Dulmen. So I put together this deck, highly based on Gerhard Markus' 3rd place deck.
7 SoloMox
1 Grim Monolith
1 Zorb
1 D-Tutor
1 D-Edict
1 Mind Twist
1 V-Tutor
1 Y-Will
1 Ancestral
1 Braingeyser
1 FoF
4 FoW
3 Impulse
4 Mana Drain
1 Mis-D
2 Morphlings
1 Mystical Tutor
1 Power Artifact
1 Stroke
1 Time Walk
1 Merchant Scroll
1 Regrowth
1 Sylvan
1 Balance
1 D-Blow
3 Wasteland
1 Strip
1 LoA
15 Duals, tilted towards B/G
Side:
3 Duress
3 ReB
2 Krosan Reclaimation
4 Oath of Druids
2 Aura Fracture
1 Ghitu Fire
The major changes I made reflect my own personal playstyle; Landwise, I removed the Tolarian Academy for another Dual, I cut down to 2 Cities to reduce the pain, I tilted a bit towards red for REBs in the side. I cut TimeTwister for Merchant Scroll as the only non-land change.
In another thread, I advocated playing a deck for a while before you start making changes and I should remember to follow my own advice.

When combo'ing it would be really nice to have the Tolarian, and I wish I had left it in. I always had enough mana to support the combo, but the Tolarian is probably necessary if you have to counter while setting up.
Round 1: Josh w/Sligh
I think I've played Josh in the last 5 tournaments straight. Since there are generally 16-24 players, thats a little bit of an abberation. He's usually playing something fast like RG or Sligh; his play is not perfect, but it is solid - I will not be getting a Bye here.

Game 1: He gets down some low pressure creatures like Mogg Sentry and Grim Lavamancer while I set up my side of the board. Though I have a fair amount of time I cant put together the combo and when I D-Tutor I notice that I really dont have any long term solutions (like Abyss) in the deck. Since he has one card and I am at 9 life I dont want to Balance, I get the ZorB instead. Its not enough and I die a couple turns later. At this point, I was pretty disillusioned; this was definitely a game I would have won with a more standard Keeper build. Well, maybe the deck is invulnerable after the sideboard.
Game 2: Side in the combo, side out Morphlings and slow cards. I get to Balance+Zorb away everything, including his hand. He topdecks better than I do, throwing down a Monkey and eating my Emerald & Saphirre while I draw Mana Drains. (Not totally unexpected; Sligh has a strong topdeck game. But I was hoping for a Pup or something rather than the Monkey.) But, before the Monkey can go the whole way I draw the Oath and some mana and I combo him out. I'd expect a Balance+Zorb game to be a bit more in my favor, but I am regaining confidence in the deck. A traditional Keeper would have had more trouble after topdecking badly after Balance; but here Oath instantly solves my problems.
Here's how I did the combo, for reference. Oath, throw deck into grave. Krosan (G1 used) during upkeep putting Y-Will on top. Draw Will and play (BG3 used). Return Lotus +5 Moxes, Land or Sol Ring if necessary. Now, if I have a Tolarian, I can return it and defend against 3xReB. Since I dont, I end up using the Lotus+Saphirre to put UUUU in the pool, which leaves UU left for Mana Drains after Power Artifact. That means I am undefended once I use U for Stroke, so generally I went for Ghitu Fire with UU floating. Ghitu Fire isnt exactly tech though, it takes up a sideboard slot. Tolarian is a more elegant solution.
Now, am I missing another combo here? This combo seems very vulnerable to certain things, which I will talk about later in the report.
Game 3: Sideboard the same; and drop a quick Oath to finish the game. I Mana Drain something to give me the mana I need to go off a turn quicker than usual.
Round 2: Phoung. (Sligh)
Phoung is a pretty good player in general, he's got an invite to Houston for whatever big Pro-Tour-ish event is being held there. He's not so much into T1, though lately I have been giving him Shade-MonoB and hoping he will wreck some of the other tough players.

Game 1: He plays Mountain-Fanatic but fails to follow it up with a second land. He casts another Fanatic, but I kept a 4 land hand which included Strip Mine. I Strip away his land while Merchant-ing for Ancestral and rapidly accellerate away.
Game 2: He starts again with Mountain-Fanatic, then follows with more Mountains and 2 Cursed Scrolls. He gets a Ball Lightning stuck in his hand, he's not willing to play into the Mana Drain(s) I obviously have. I am not able to draw anything useful for the longest time, but I am in complete control of the game with a Zorb and thousands of lands on the table. Eventually, I get the Tutor I need and hardcast the combo with tons of counter-backup (as he flashed me a ReB during one Scrolling.)
Now this game was interesting, when the classic Maher Oath decks became popular in Extended, Sligh reacted by refusing to put creatures on the board. Viashino Sandstalker, Mogg Fanatic etc. It was a strategy that was relatively successful, and I think it points out yet another weakness with the Combo-Oath-transform sideboard.
Round 3: Peter (TnT)
Last week Peter was playing an interesting RU Tubbies with the Mask combo thrown in. I played him after that tourney and beat him 2-1 with the Survival powered TnT. This week, his deck had Survival also.

Game 1: My hand has no FoW, but I do have a Mind Twist and a couple Mana Drains. I think about throwing it back, looking for Tutoring or FoWs, but keep. He plays Land-Mox-Mox-Mask-Dreadnaught on the first turn. I am able to Mind Twist away the rest of his hand by drawing the Lotus, but its already too late. Wow.
Game 2: He keeps a slow start and gets a Lyrist on the board. I feed it one Oath, then get a second one on the board. I think he is locked out until he casts Memory Jar. Hmmm. Thats not so good for my plan. Now I am digging to hardcast the combo or get the D-Blow. I Impulse into the Tutor I need to finish the combo next turn, while he simultaneously decides to go for the win. He breaks the Jar, and I draw crap. He plays Survival and fetches an Angry Lryist to destroy the Oath. But then I get my hand back and combo him out. Whew.
Game 3: I keep a little bit slow start. He gets a Juggy on the table and hits me a couple times while I Mindtwist his hand away. Genesis and Anger are both in the grave. Hmm. I get an Oath and think I am going to Combo him out when he makes a stylish play - cast Dread to bury both Juggy and Dread. We're in topdeck mode and I topdeck 4 land. He gets Survival and wrecks me, first with an Angry Lyrist to take care of the Oath and then with a stream of big creatures.
We play again for fun, and he is winning when we need to go to the next round. Looks like it could have been 1-3 in games. Hmmm.
So what does this mean? The Combo is supposed to be (in part) a reaction to TnT. This hybrid TnT though has its own Combo which can be just as fast. On the flip side, I've played the traditional Keeper v. TnT matchup tons of times from the TnT side and I really like my chances, so I'm not sure that the Mask version is necessarily more dangerous, just perhaps flashier.
The Memory Jar also shows another unexpected weakness of the Oath plan. Hmm, instant speed draw effects + empty library = instant loss.
Round 4: RB Land Destruction/Discard/Troll
I'm 2-1 and paired down, I face a deck that isnt very tuned and smash it in the way that Keeper does. I see a little bit of that problem with Oath again; my opponent refuses to play creatures in the second game and I cant combo him out until I can Tutor up the pieces.
The results of the tourney are 1) Peter (TnT+Mask), 2) Ryan (Enchantress), 3) me (Combo-Keeper), 4) Clint (UB control), 5) Andrew (MonoB-Void), 6) Max (Academy). Andrew's did a nice report about his experiences, check that out as well for another perspective.
After the tourney I play the second place player who is with Enchantress for fun. I generally win this matchup, though after sideboarding its pretty clear that Seal Of Cleansing causes a lot of problems, especially if you intend to cast the combo under Will. You cannot afford to have the combo removed from the game after you have emptied your library, so a Seal immediately stops your forward progress.
Conclusions: Overall, I see a bunch of vulnerabilities with this particular sideboard. I think that with surprise it is devastating, but with correct play and a week to prepare by your opponents, it has too many weaknesses to survive. I will try something more like Carsten or Dozers build next time I play Keeper.