First Day of Class + Yahenni, Undying Partisan

First Day of Class

Yahenni, Undying Partisan

How it works

1. Cast First Day of Class by paying 1.
2. Activate Yahenni by sacrificing the persist creature.
3. When the persist creature dies, its persist ability triggers, returning it from your graveyard to the battlefield with a -1/-1 counter on it.
4. When the persist creature enters, First Day of Class triggers, putting a +1/+1 counter on the persist creature.
5. Resolve the Yahenni ability.
6. Repeat from step 2