Viscera Seer + Restless Apparition + Hardened Academic

Viscera Seer

Restless Apparition

Hardened Academic

How it works

1. Activate Viscera Seer by sacrificing Restless Apparition.
2. When Restless Apparition 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 Restless Apparition.
4. Resolve the Viscera Seer ability.
5. Repeat.