Melira, Sylvok Outcast + Lesser Masticore + Yahenni, Undying Partisan

Melira, Sylvok Outcast

Lesser Masticore

Yahenni, Undying Partisan

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 without a -1/-1 counter on it due to Melira.
3. Resolve the Yahenni ability
4. Repeat.