Defiler of Faith + The Wind Crystal + Kor Skyfisher + Bogwater Lumaret

Defiler of Faith

The Wind Crystal

Kor Skyfisher

Bogwater Lumaret

How it works

1. Cast Kor Skyfisher by paying 0 and 2 life due to Defiler of Faith and The Wind Crystal.
2. Defiler of Faith triggers, creating a 1/1 Soldier creature token.
3. When the Soldier enters, Bogwater Lumaret triggers, causing you to gain life.
4. Resolve Kor Skyfisher. When it enters, it and Bogwater Lumaret trigger.
5. Resolve the Kor Skyfisher trigger, returning it from the battlefield to your hand.
6. Resolve the Bogwater Lumaret trigger, causing you to gain life.
7. Repeat.

This loop achieves complete infiniteness by exploiting cost reduction and life-doubling to cast Kor Skyfisher for free over and over again. With The Wind Crystal discounting your white spells by {1} and Defiler of Faith shaving off an additional {W} in exchange for 2 life, the Skyfisher's mana cost is completely erased; meanwhile, The Wind Crystal also doubles your lifegain, turning the life you pay for the Defiler right back into a net positive. Every iteration is fueled by Bogwater Lumaret capitalizing on the constant stream of tokens churned out by Defiler of Faith's cast trigger and the endless entering and leaving of Kor Skyfisher itself.