Eirdu, Carrier of Dawn // Isilu, Carrier of Twilight + Maulfist Squad + Phantom Train
Eirdu, Carrier of Dawn // Isilu, Carrier of Twilight
Maulfist Squad
Phantom Train
Infinite creature LTBInfinite creature ETBInfinite creature sacrifice triggersInfinite death triggersInfinite +1/+1 counters on a creature
How it works
Activate Phantom Train by sacrificing Maulfist Squad.
When Maulfist Squad dies, its persist ability triggers, returning it from your graveyard to the battlefield with a -1/-1 counter on it.
When Maulfist Squad enters, its fabricate ability triggers, putting a +1/+1 counter on it.
Resolve the Phantom Train ability.
Repeat.
This clever loop relies on the transforming front face of Eirdu, Carrier of Dawn // Isilu, Carrier of Twilight to grant persist to your nontoken creatures, allowing Maulfist Squad to repeatedly enter and leave the battlefield. When Maulfist Squad dies after being fed to Phantom Train, the persist ability granted by Isilu brings it straight back with a -1/-1 counter. Fortunately, Maulfist Squad's fabricate 1 ability immediately places a +1/+1 counter on it upon re-entry, allowing state-based actions to cancel out the -1/-1 counter so the loop can be executed endlessly.