Mikaeus, the Unhallowed + Safehold Elite + Yahenni, Undying Partisan

Mikaeus, the Unhallowed

Safehold Elite

Yahenni, Undying Partisan

How it works

1. Activate Yahenni by sacrificing Safehold Elite.
2. When Safehold Elite dies, its persist ability triggers, returning it from your graveyard to the battlefield with a -1/-1 counter on it.
3. Resolve the Yahenni ability.
4. Activate Yahenni by sacrificing Safehold Elite.
5. When Safehold Elite dies, its undying ability triggers, returning it from your graveyard to the battlefield with a +1/+1 counter on it.
6. Resolve the Yahenni ability.
7. Repeat.