Metamorphosis Fanatic, Phantom Train, and Faceless Butcher

Prerequisites

• Metamorphosis Fanatic in hand
• Phantom Train on the battlefield
• Faceless Butcher in the graveyard
• available

Steps

1. Cast Metamorphosis Fanatic by paying
2. When Metamorphosis Fanatic enters, it triggers, returning Faceless Butcher from your graveyard to the battlefield
3. When Faceless Butcher enters, it triggers, exiling Metamorphosis Fanatic
4. Activate Phantom Train by sacrificing Faceless Butcher
5. When Faceless Butcher dies, it triggers, returning Metamorphosis Fanatic from exile to the battlefield
6. Repeat from step 2
7. Resolve all Phantom Train abilities

Results

• Infinite LTB
• Infinite ETB
• Infinite sacrifice triggers
• Infinite death triggers
• Infinite +1/+1 counters on a creature