Stalwart Successor + Lesser Masticore + Bloodflow Connoisseur

Stalwart Successor

Lesser Masticore

Bloodflow Connoisseur

How it works

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