Eirdu, Carrier of Dawn // Isilu, Carrier of Twilight + Ashnod's Altar + Ambitious Aetherborn

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

Ashnod's Altar

Ambitious Aetherborn

How it works

1. Activate Ashnod's Altar 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. Repeat.

This clever loop turns Ashnod's Altar into an infinite mana engine by exploiting the constant rebirth of Ambitious Aetherborn. The key to keeping the cycle going is Isilu, Carrier of Twilight (the back face of Eirdu, Carrier of Dawn), which grants Ambitious Aetherborn the persist ability so it returns from the grave after being sacrificed. When the Aetherborn reenters the battlefield, its fabricate 1 ability places a +1/+1 counter on it, which immediately neutralizes the -1/+1 counter it received from persist through state-based actions. This allows the creature to be sacrificed to the Altar over and over again, generating endless colorless mana alongside a storm of death and sacrifice triggers.