Mayael's Aria + Dark Depths + Mutated Cultist

Mayael's Aria

Dark Depths

Mutated Cultist

How it works

1. Cast Mutated Cultist by paying 2. Mutated Cultist triggers, removing all ice counters from Dark Depths.
2. Dark Depths triggers, causing you to sacrifice it and create a 20/20 Marit Lage legendary creature token.
3. At the beginning of your next upkeep, Mayael's Aria triggers, causing you to put a +1/+1 counter on each creature you control, gain 10 life and win the game.