Mikaeus, the Unhallowed + Kitchen Finks + Yahenni, Undying Partisan

Mikaeus, the Unhallowed

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 triggers, causing you to gain 2 life.
4. Resolve the Yahenni ability.
5. Activate Yahenni by sacrificing Kitchen Finks.
6. When Kitchen Finks dies, its undying ability triggers, returning it from your graveyard to the battlefield with a +1/+1 counter on it.
7. When Kitchen Finks enters, it triggers, causing you to gain 2 life.
8. Resolve the Yahenni ability.
9. Repeat.