Mikaeus, the Unhallowed + Furystoke Giant + Bloodflow Connoisseur

Mikaeus, the Unhallowed

Furystoke Giant

Bloodflow Connoisseur

How it works

1. Activate Bloodflow Connoisseur by sacrificing Furystoke Giant.
2. When Furystoke Giant 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 Furystoke Giant.
5. When Furystoke Giant 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.