Defiler of Vigor + Spike Feeder + Rancor + Gatherer of Graces

Defiler of Vigor

Spike Feeder

Rancor

Gatherer of Graces

How it works

1. Pay 2 life to cast Rancor targeting any creature.
2. Defiler of Vigor triggers, putting a +1/+1 counter on each creature you control.
3. Remove a +1/+1 counter from Spike Feeder to activate it, gaining 2 life.
4. Resolve Rancor.
5. Sacrifice Rancor to Gatherer of Graces.
6. Rancor triggers, returning to your hand.
7. Resolve the Gatherer of Graces ability, regenerating it.
8. Repeat.