Metamorphosis Fanatic, Wormfang Drake, and Yahenni, Undying Partisan

Prerequisites

• Metamorphosis Fanatic in hand
• Wormfang Drake in the graveyard
• Yahenni, Undying Partisan on the battlefield
• available

Steps

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

Results

• Infinite LTB
• Infinite ETB
• Infinite sacrifice triggers
• Infinite death triggers