Preston, the Vanisher + Metamorphosis Fanatic + Phantom Train + Chord of Calling
Preston, the Vanisher
Metamorphosis Fanatic
Phantom Train
Chord of Calling
Infinite +1/+1 counters on a creatureInfinite creature ETBInfinite creature LTBInfinite creature tokensInfinite death triggersInfinite recursion of creature cards in your graveyardInfinite creature sacrifice triggers
How it works
Cast Chord of Calling by paying at most 6, searching your library for Metamorphosis Fanatic and putting it onto the battlefield.
When Metamorphosis Fanatic enters, it and Preston trigger.
Resolve the Metamorphosis Fanatic trigger, returning an applicable target from your graveyard to the battlefield.
Holding priority, activate Phantom Train by sacrificing Metamorphosis Fanatic.
Resolve the Preston trigger, creating a token copy of Metamorphosis Fanatic that is a 0/1 Illusion.
When the Metamorphosis Fanatic token enters, it triggers, returning Metamorphosis Fanatic from your graveyard to the battlefield.