Woodfall Primus + Yahenni, Undying Partisan + Hardened Academic

Woodfall Primus

Yahenni, Undying Partisan

Hardened Academic

How it works

1. Activate Yahenni by sacrificing Woodfall Primus.
2. When Woodfall Primus dies, its persist ability triggers, returning it from your graveyard to the battlefield with a -1/-1 counter on it.
3. Hardened Academic and Woodfall Primus trigger.
4. Resolve the Hardened Academic trigger, putting a +1/+1 counter on Woodfall Primus.
5. Resolve the Woodfall Primus trigger, destroying target noncreature permanent.
6. Resolve the Yahenni ability
7. Repeat.