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