Long Feng, Grand Secretariat + Altar of Dementia

Long Feng, Grand Secretariat

Altar of Dementia

How it works

1. Activate Altar of Dementia by sacrificing a persist creature that doesn't have a -1/-1 counter on it.
2. When the creature dies, its persist ability and Long Feng trigger.
3. Resolve the Long Feng trigger, putting a +1/+1 counter on the other persist creature.
4. Resolve the persist trigger, returning the creature from your graveyard to the battlefield with a -1/-1 counter on it.
5. Resolve the Altar of Dementia ability.
6. Repeat.