Metamorphosis Fanatic, Prowling Geistcatcher, and Blasting Station

Prerequisites

• Metamorphosis Fanatic in exile
• Prowling Geistcatcher on the battlefield
• Blasting Station on the battlefield

Steps

1. Activate Blasting Station by tapping it and sacrificing Prowling Geistcatcher
2. When Prowling Geistcatcher dies, its second ability triggers, returning Metamorphosis Fanatic from exile to the battlefield
3. When Metamorphosis Fanatic enters the battlefield, it and Blasting Station trigger, Resolve the Blasting Station trigger, untapping it
4. Resolve the Metamorphosis Fanatic trigger, returning Prowling Geistcatcher from your graveyard to the battlefield
5. When Prowling Geistcatcher enters the battlefield, Blasting Station triggers
6. Holding priority, activate Blasting Station by tapping it and sacrificing Metamorphosis Fanatic
7. When Metamorphosis Fanatic dies, Prowling Geistcatcher's first ability triggers, exiling Metamorphosis Fanatic from your graveyard
8. Resolve the Blasting Station ability from step 7
9. Resolve the Blasting Station trigger from step 6, untapping it
10. Resolve the Blasting Station ability from step 1
11. Repeat from step 1

Results

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