Ob Nixilis, the Adversary

Flying At the beginning of your end step, you may sacrifice another creature. When you do, Ziatora deals damage equal to that creature's power to any target and you create three Treasure tokens.

At the beginning of combat on your turn, if you control two or more multicolored permanents, this creature gains double strike until end of turn.

(T: Add G, W, or U.) This land enters tapped. Cycling 3 (3, Discard this card: Draw a card.)

You may pay RG rather than pay this spell's mana cost. Spend only mana produced by Treasures to cast it this way.

Create two 1/1 blue Fish creature tokens with "This token can't be blocked." Then for each kind of counter among creatures you control, put a counter of that kind on either of those tokens.

Creatures you control get +1/+0 and have vigilance as long as you control three or more creatures. Creatures you control also get +1/+0 and have trample as long as you control six or more creatures. Creatures you control also get +1/+0 and have double strike as long as you control nine or more creatures.

Whenever this creature attacks, this creature and up to one other target creature you control both gain your choice of first strike or lifelink until end of turn.

W, T, Untap a tapped creature you control: Create a 1/1 green and white Citizen creature token. WW, T, Untap two tapped creatures you control: Draw a card. WWWWW, T, Untap fifteen tapped creatures you control: You win the game.