Soul Echo + Axis of Mortality + Wall of Blood

Soul Echo

Axis of Mortality

Wall of Blood

How it works

1. At the beginning of your upkeep, Axis of Mortality triggers.
2. Activate Wall of Blood by paying 1 life, giving Wall of Blood +1/+1 until end of turn.
3. Repeat step 2 until you have zero life.
4. Resolve the Axis of Mortality trigger, swapping your life total with an opponent.
5. The opponent loses the game due to having zero life.
6. You may repeat this on each of your turns.