Defiler of Faith + Anointer Priest + Kor Skyfisher + Grand Arbiter Augustin IV

Defiler of Faith

Anointer Priest

Kor Skyfisher

Grand Arbiter Augustin IV

How it works

1. Cast Kor Skyfisher 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, Anointer Priest triggers, causing you to gain life.
4. Resolve Kor Skyfisher. When it enters, it and Anointer Priest trigger.
5. Resolve the Kor Skyfisher trigger, returning it from the battlefield to your hand.
6. Resolve the Anointer Priest trigger, causing you to gain life.
7. Repeat.

This loop transforms the humble Kor Skyfisher into a self-returning engine by leveraging cost reduction to make its mana value free. With Grand Arbiter Augustin IV reducing white spells by {1} and Defiler of Faith discounting them further by trading 2 life, you can cast the Skyfisher for no mana at all. Every iteration triggers Defiler of Faith to birth a 1/1 Soldier token, which in turn prompts Anointer Priest to pad your life total back up and outpace the life paid to the Defiler. Finally, when Kor Skyfisher resolves, its own entry trigger forces it right back to your hand, ready to repeat the cycle indefinitely.