Thran Vigil + Bloodflow Connoisseur

Thran Vigil

Bloodflow Connoisseur

How it works

1. Activate Bloodflow Connoisseur by sacrificing the creature with persist.
2. When that creature dies, its persist ability triggers, returning it from your graveyard to the battlefield with a -1/-1 counter on it.
3. Thran Vigil triggers, putting a +1/+1 counter on that creature.
4. Remove a +1/+1 counter and a -1/-1 counter from that creature as a state-based action.
5. Resolve the Bloodflow Connoisseur ability from step 1.
6. Repeat.