Mikaeus, the Unhallowed + Restless Apparition + Bloodflow Connoisseur

Mikaeus, the Unhallowed

Restless Apparition

Bloodflow Connoisseur

How it works

1. Activate Bloodflow Connoisseur by sacrificing Restless Apparition.
2. When Restless Apparition dies, its persist ability triggers, returning it from your graveyard to the battlefield with a -1/-1 counter on it.
3. Resolve the Bloodflow Connoisseur ability.
4. Activate Bloodflow Connoisseur by sacrificing Restless Apparition.
5. When Restless Apparition dies, its undying ability triggers, returning it from your graveyard to the battlefield with a +1/+1 counter on it.
6. Resolve the Bloodflow Connoisseur ability.
7. Repeat.