Metamorphosis Fanatic + Body Double + Phantom Train

Metamorphosis Fanatic

Body Double

Phantom Train

How it works

1. Cast Metamorphosis Fanatic by paying 4.
2. When Metamorphosis Fanatic enters the battlefield, it triggers, targeting Body Double.
3. Holding priority, activate Phantom Train by sacrificing Metamorphosis Fanatic, putting a +1/+1 counter on Phantom Train.
4. Resolve the Metamorphosis Fanatic ability, returning Body Double from your graveyard to the battlefield as a copy of Metamorphosis Fanatic.
5. When Body Double enters the battlefield, it triggers, targeting Metamorphosis Fanatic.
6. Holding priority, activate Phantom Train by sacrificing Body Double, putting a +1/+1 counter on Phantom Train.
7. Resolve the Body Double ability, returning Metamorphosis Fanatic from your graveyard to the battlefield.
8. Repeat from step 2.