Eirdu, Carrier of Dawn // Isilu, Carrier of Twilight + Stormbound Geist + Phantom Train

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

Stormbound Geist

Phantom Train

How it works

1. Activate Phantom Train by sacrificing Stormbound Geist
2. When Stormbound Geist dies, its undying ability triggers, returning it from your graveyard to the battlefield with a +1/+1 counter on it.
3. Activate Phantom Train by sacrificing Stormbound Geist
4. When Stormbound Geist dies, its persist ability triggers, returning it from your graveyard to the battlefield with a -1/-1 counter on it.
5. Resolve both Phantom Train abilities from step 1 and 3.
6. Repeat.

This clever loop relies on the constant transformation of Eirdu, Carrier of Dawn // Isilu, Carrier of Twilight, whose back face grants your other nontoken creatures persist, while Stormbound Geist naturally brings its own undying ability to the graveyard. By alternating between sacrificing the Geist to Phantom Train while it wears a +1/+1 counter (triggering undying) and while it wears a -1/+1 counter (triggering persist, granted by Isilu), the Geist endlessly cycles between life and death. Because Phantom Train accepts these repeated sacrifices to grow larger, this cyclical engine endlessly feeds your death and sacrifice triggers while pumping the Vehicle to astronomical proportions.