Lesser Masticore + Yahenni, Undying Partisan + Serra Redeemer

Lesser Masticore

Yahenni, Undying Partisan

Serra Redeemer

How it works

1. Activate Yahenni by sacrificing Lesser Masticore
2. When Lesser Masticore dies, its persist ability triggers, returning it from your graveyard to the battlefield with a -1/-1 counter on it.
3. When Lesser Masticore enters, Serra Redeemer triggers, putting a +1/+1 counter on Lesser Masticore
4. Resolve the Yahenni ability.
5. Repeat.