This could get really out of hand really fast. I like it.
If you can't see the image:
Treasury Thrull 4WB
Extort (Whenever you cast a spell, you may pay W/B. If you do, each opponent loses 1 life and you gain that much life.)
Whenever CARDNAME attacks, you may return target artifact, creature, or enchantment card from your graveyard to your hand.
This big ole guy's just asking to be in my Tariel EDH deck...
Extort's interesting. Definitely good for later on in the game when you've got a lot of mana to burn, and it can really make for shenanigans in any sort of multiplayer. I really like it. It's like playing Exsanguinate with every spell.
Seems like a pretty basic mechanic, but interesting. This one is certainly the least easy to figure out, except for the "lose life/gain life" part of it. Will the cost be different each time or the life gain be different? Who knows at this point.
extort is fine in limited and rewards getting a bunch of them, but it will end up leading to the worst creatures: 2WB 2/2 extort. That's basically what these cards will be. This preview is the worst yet. 6 mana needs to just do more than this. It's unacceptably weak in this era of magic regardless of whether any of us like it or not.