Eirdu, Carrier of Dawn // Isilu, Carrier of Twilight + Strangleroot Geist + Phantom Train
Eirdu, Carrier of Dawn // Isilu, Carrier of Twilight
Strangleroot Geist
Phantom Train
Infinite +1/+1 counters on a creatureInfinite creature ETBInfinite creature LTBInfinite death triggersInfinite creature sacrifice triggers
How it works
Activate Phantom Train by sacrificing Strangleroot Geist
When Strangleroot Geist dies, its undying ability triggers, returning it from your graveyard to the battlefield with a +1/+1 counter on it.
Resolve the Phantom Train ability.
Activate Phantom Train by sacrificing Strangleroot Geist
When Strangleroot Geist dies, its persist ability triggers, returning it from your graveyard to the battlefield with a -1/-1 counter on it.
Strangleroot Geist enters and dies as a state-based action due to having 0 toughness. Its undying ability triggers, returning it from your graveyard to the battlefield with a +1/+1 counter on it.