Eirdu, Carrier of Dawn // Isilu, Carrier of Twilight + Phantom Train + Iron League Steed
Infinite LTB, Infinite ETB, Infinite sacrifice triggers, Infinite death triggers, Infinite +1/+1 counters on a creature
Activate Phantom Train by sacrificing Iron League Steed.
When Iron League Steed dies, its persist ability triggers, returning it from your graveyard to the battlefield with a -1/-1 counter on it.
When Iron League Steed enters, its fabricate ability triggers, putting a +1/+1 counter on it.
Resolve the Phantom Train ability.
Repeat.
Component Cards
How It Works
Activate Phantom Train by sacrificing Iron League Steed.
When Iron League Steed dies, its persist ability triggers, returning it from your graveyard to the battlefield with a -1/-1 counter on it.
When Iron League Steed enters, its fabricate ability triggers, putting a +1/+1 counter on it.
Resolve the Phantom Train ability.
Repeat.