Infinite LTB, Infinite ETB, Infinite sacrifice triggers, Infinite death triggers, Infinite +1/+1 counters on a creature
Activate Phantom Train by sacrificing the persist creature.
When the persist creature dies, its persist ability triggers, returning the persist creature from your graveyard to the battlefield with a -1/-1 counter on it.
When the persist creature enters, Stalwart Successor triggers, putting a +1/+1 counter on the persist creature.
Resolve the Phantom Train ability.
Repeat.
Component Cards
How It Works
Activate Phantom Train by sacrificing the persist creature.
When the persist creature dies, its persist ability triggers, returning the persist creature from your graveyard to the battlefield with a -1/-1 counter on it.
When the persist creature enters, Stalwart Successor triggers, putting a +1/+1 counter on the persist creature.
Resolve the Phantom Train ability.
Repeat.