Faceless Butcher, Bloodthrone Vampire, and Metamorphosis Fanatic

Prerequisites

• Faceless Butcher in hand
• Bloodthrone Vampire on the battlefield
• Metamorphosis Fanatic on the battlefield
• available

Steps

1. Cast Faceless Butcher by paying its mana cost
2. When Faceless Butcher enters, its first ability triggers, exiling Metamorphosis Fanatic
3. Activate Bloodthrone Vampire by sacrificing Faceless Butcher
4. When Faceless Butcher dies, its second ability triggers, returning Metamorphosis Fanatic from exile to the battlefield
5. When Metamorphosis Fanatic enters, it triggers, returning Faceless Butcher from your graveyard to the battlefield
6. When Faceless Butcher enters, its first ability triggers, exiling Metamorphosis Fanatic
7. Resolve the Bloodthrone Vampire ability
8. Repeat from step 3

Results

• Infinite creature ETB
• Infinite creature LTB
• Infinite creature sacrifice triggers
• Infinite death triggers
• Infinitely large creature until end of turn