Doomsday + Thassa's Oracle

Doomsday

Thassa's Oracle

How it works

1. Cast Doomsday by paying , searching your library and graveyard for any five other cards, exiling all other cards from your graveyard and library, and then placing the remaining cards on top of your library and losing half your life, rounded up.
2. Cast Thassa's Oracle by paying .
3. Thassa's Oracle enters the battlefield, winning the game.

This compact win condition relies on Doomsday to completely reconstruct your library, packing it with just the exact cards needed to clear the remaining deck or pump up your blue devotion. Once your library is reduced to a single-card stack, you simply cast Thassa's Oracle. When Thassa's Oracle enters the battlefield, its triggered ability checks your blue devotion against the size of your now-empty library, instantly securing the victory.