Stalwart Successor + Viscera Seer + Rendclaw Trow

Stalwart Successor

Viscera Seer

Rendclaw Trow

How it works

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