Eirdu, Carrier of Dawn // Isilu, Carrier of Twilight + Slurrk, All-Ingesting + Altar of Dementia

Eirdu, Carrier of Dawn // Isilu, Carrier of Twilight

Slurrk, All-Ingesting

Altar of Dementia

How it works

1. Activate Altar of Dementia by sacrificing Slurrk.
2. When Slurrk dies, its innate ability and persist ability trigger.
3. Resolve Slurrk's innate ability, putting a +1/+1 counter on each creature you control that already has a +1/+1 counter on it.
4. Resolve Slurrk's persist ability, returning it from your graveyard to the battlefield with four +1/+1 counters on it due to its replacement effect.
5. Resolve the Altar of Dementia ability.
6. Repeat.