Stalwart Successor + Kitchen Finks + Yahenni, Undying Partisan

Stalwart Successor

Kitchen Finks

Yahenni, Undying Partisan

How it works

1. Activate Yahenni 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 Yahenni ability.
7. Repeat.