Tree of Perdition + Hidetsugu's Second Rite + Comet Storm

Tree of Perdition

Hidetsugu's Second Rite

Comet Storm

How it works

1. Activate Tree of Perdition by tapping it, swapping its toughness with an opponent's life total.
2. Cast Comet Storm by paying 3, dealing 3 damage to the opponent.
3. Cast Hidetsugu's Second Rite by paying 3, dealing 10 damage to the opponent.
4. The opponent loses the game due to having zero life.