Twilight Shepherd + Yahenni, Undying Partisan + Hardened Academic

Twilight Shepherd

Yahenni, Undying Partisan

Hardened Academic

How it works

1. Activate Yahenni by sacrificing Twilight Shepherd.
2. When Twilight Shepherd dies, its persist ability triggers, returning it from your graveyard to the battlefield with a -1/-1 counter on it.
3. Hardened Academic triggers, putting a +1/+1 counter on Twilight Shepherd.
4. Resolve the Yahenni ability.
5. Repeat.