Eirdu, Carrier of Dawn // Isilu, Carrier of Twilight + Ambitious Aetherborn + Phantom Train

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

Ambitious Aetherborn

Phantom Train

How it works

1. Activate Phantom Train 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 Phantom Train ability.
5. Repeat.

This ingenious engine centers around the dual-faced nature of Eirdu, Carrier of Dawn // Isilu, Carrier of Twilight, whose back face grants your nontoken creatures persist to keep your sacrificial fodder returning from the dead. By feeding Ambitious Aetherborn to Phantom Train, you trigger its persist ability to bring it right back to the battlefield, where its fabricate ability counters the resulting -1/-1 counter with a fresh +1/+1 counter. Meanwhile, Eirdu, Carrier of Dawn // Isilu, Carrier of Twilight can leverage its front face to help cast creature spells using convoke, though this particular loop harnesses the back face's resurrection mechanics to effortlessly farm infinite death triggers and counters.