Tree of Perdition + Offspring's Revenge + Corpse Knight

Tree of Perdition

Offspring's Revenge

Corpse Knight

How it works

1. At the beginning of your combat phase, Offspring's Revenge triggers, exiling Tree of Perdition from your graveyard and creating a 1/1 copy of it with haste.
2. When the Tree of Perdition token enters the battlefield, Corpse Knight triggers.
3. Holding priority, activate the Tree of Perdition token by tapping it, swapping an opponent's life total with Tree of Perdition's toughness.
4. Resolve the Corpse Knight trigger, causing each opponent to lose 1 life.
5. The opponent whose life total was swapped loses the game due to having zero or les life.