Defiler of Faith + Ajani's Welcome + Whitemane Lion + Grand Arbiter Augustin IV

Defiler of Faith

Ajani's Welcome

Whitemane Lion

Grand Arbiter Augustin IV

How it works

1. Cast Whitemane Lion by paying 0 and 2 life due to Defiler of Faith and Grand Arbiter Augustin IV.
2. Defiler of Faith triggers, creating a 1/1 Soldier creature token.
3. When the Soldier enters, Ajani's Welcome triggers, causing you to gain life.
4. Resolve Whitemane Lion. When it enters, it and Ajani's Welcome trigger.
5. Resolve the Whitemane Lion trigger, returning it from the battlefield to your hand.
6. Resolve the Ajani's Welcome trigger, causing you to gain life.
7. Repeat.

This loop relies on a clever cost-reduction engine to cast Whitemane Lion for free, as Grand Arbiter Augustin IV and Defiler of Faith work together to completely wipe away its mana cost in exchange for a bit of life. Every time the Lion enters the battlefield, its own ability forces you to return it to your hand, while Ajani's Welcome rewards each creature entry—including the 1/1 Soldier tokens generated by Defiler of Faith's cast trigger—with a steady stream of life. By continually bouncing and recasting the Lion at zero mana, you churn through an infinite number of creature spells, triggers, and tokens.