Stalwart Successor + Kitchen Finks + Carrion Feeder

Stalwart Successor

Kitchen Finks

Carrion Feeder

How it works

1. Activate Carrion Feeder by sacrificing Kitchen Finks
2. When Kitchen Finks dies, its persist ability triggers, returning it from your graveyard to the battlefield with a -1/-1 counter on it.
3. When Kitchen Finks enters, it and Stalwart Successor trigger.
4. Resolve the Kitchen Finks trigger, causing you to gain 2 life.
5. Resolve the Stalwart Successor trigger, putting a +1/+1 counter on Kitchen Finks
6. Resolve the Carrion Feeder ability.
7. Repeat.