Defiler of Faith + Anointer Priest + The Immortal Sun + Whitemane Lion

Defiler of Faith

Anointer Priest

The Immortal Sun

Whitemane Lion

How it works

1. Cast Whitemane Lion by paying 0 and 2 life due to Defiler of Faith and The Immortal Sun.
2. Defiler of Faith triggers, creating a 1/1 Soldier creature token.
3. When the Soldier enters, Anointer Priest triggers, causing you to gain life.
4. Resolve Whitemane Lion. When it enters, it and Anointer Priest trigger.
5. Resolve the Whitemane Lion trigger, returning it from the battlefield to your hand.
6. Resolve the Anointer Priest trigger, causing you to gain life.
7. Repeat.

This clever loop relies on stacking cost reductions from The Immortal Sun and Defiler of Faith to make Whitemane Lion entirely free to cast. As you repeatedly drop the Lion, Defiler of Faith rewards each cast by creating a 1/1 Soldier token, which in turn triggers Anointer Priest to pad your life total. Since Whitemane Lion's own enters-the-battlefield ability forces you to bounce a creature, it neatly returns itself to your hand so you can cast it all over again.