Eirdu, Carrier of Dawn // Isilu, Carrier of Twilight + Altar of Dementia + Ambitious Aetherborn

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

Altar of Dementia

Ambitious Aetherborn

How it works

1. Activate Altar of Dementia by sacrificing Ambitious Aetherborn.
2. When Ambitious Aetherborn dies, its persist ability triggers, returning it from your graveyard to the battlefield with a -1/-1 counter on it.
3. When Ambitious Aetherborn enters, its fabricate ability triggers, putting a +1/+1 counter on it.
4. Resolve the Altar of Dementia ability.
5. Repeat.

This clever loop relies on the transforming front and back of Eirdu, Carrier of Dawn // Isilu, Carrier of Twilight, whose Isilu, Carrier of Twilight face grants your nontoken creatures persist to keep the engine fueled. When you sacrifice Ambitious Aetherborn to Altar of Dementia, its persist ability brings it right back with a -1/-1 counter, but its fabricate 1 ability immediately places a +1/+1 counter that neutralizes the penalty through state-based actions. This continuous cycle repeats indefinitely to mill out your opponents while generating an endless stream of sacrifice and death triggers.