Eirdu, Carrier of Dawn // Isilu, Carrier of Twilight + Ashnod's Altar + Iron League Steed

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

Ashnod's Altar

Iron League Steed

How it works

1. Activate Ashnod's Altar by sacrificing Iron League Steed.
2. When Iron League Steed dies, its persist ability triggers, returning it from your graveyard to the battlefield with a -1/-1 counter on it.
3. When Iron League Steed enters, its fabricate ability triggers, putting a +1/+1 counter on it.
4. Repeat.

This clever loop relies on Isilu, Carrier of Twilight—the night-facing side of Eirdu, Carrier of Dawn—to grant your nontoken creatures the persist ability, allowing Iron League Steed to claw its way back from the graveyard whenever it perishes. When the Steed returns, its fabricate ability triggers, letting you place a +1/+1 counter on it to immediately cancel out the -1/-1 counter it received from persist. From there, you simply feed the Steed to Ashnod's Altar for a steady stream of colorless mana, resetting its counters and repeating the cycle indefinitely to generate limitless sacrifices and death triggers.