Metamorphosis Fanatic, Prowling Geistcatcher, and Shilgengar, Sire of Famine

Prerequisites

• Metamorphosis Fanatic on the battlefield
• Prowling Geistcatcher on the battlefield
• Shilgengar, Sire of Famine on the battlefield

Steps

1. Activate Shilgengar by sacrificing Metamorphosis Fanatic
2. When Metamorphosis Fanatic dies, Prowling Geistcatcher's first ability triggers, exiling Metamorphosis Fanatic from your graveyard
3. Resolve the Shilgengar ability
4. Activate Shilgengar by sacrificing Prowling Geistcatcher
5. When Prowling Geistcatcher dies, its second ability triggers, returning Metamorphosis Fanatic from exile to the battlefield
6. When Metamorphosis Fanatic enters the battlefield, it triggers, returning Prowling Geistcatcher from your graveyard to the battlefield
7. Resolve the Shilgengar ability
8. Repeat

Results

• Infinite LTB
• Infinite ETB
• Infinite sacrifice triggers
• Infinite death triggers
• Infinite Blood tokens