Tree of Perdition + Bloodletter of Aclazotz

Prerequisites

An opponent has a higher life total than Tree of Perdition's toughness.

Steps

1. Activate Tree of Perdition by tapping it, causing its toughness to become equal to an opponents life total, and causing that opponent to lose life equal to twice the difference between their life total and Tree of Perdition's toughness as the ability resolved.
2. If the opponent's life total was at least double Tree of Perdition's toughness as the ability resolved, they will lose the game as a state-based action due to having 0 or less life.