Viscera Seer + Glen Elendra Archmage + Hardened Academic

Viscera Seer

Glen Elendra Archmage

Hardened Academic

How it works

1. Activate Viscera Seer by sacrificing Glen Elendra Archmage.
2. When Glen Elendra Archmage 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 Glen Elendra Archmage.
4. Resolve the Viscera Seer ability.
5. Repeat.