Stalwart Successor + Viscera Seer + Wingrattle Scarecrow

Stalwart Successor

Viscera Seer

Wingrattle Scarecrow

How it works

1. Activate Viscera Seer by sacrificing Wingrattle Scarecrow
2. When Wingrattle Scarecrow dies, its persist ability triggers, returning it from your graveyard to the battlefield with a -1/-1 counter on it.
3. When Wingrattle Scarecrow enters, Stalwart Successor triggers, putting a +1/+1 counter on Wingrattle Scarecrow
4. Resolve the Viscera Seer ability.
5. Repeat.