Metamorphosis Fanatic, Bartolomé del Presidio, and Lagrella, the Magpie

Prerequisites

• Metamorphosis Fanatic in hand
• Bartolomé del Presidio on the battlefield
• Lagrella, the Magpie in the graveyard
• available

Steps

1. Cast Metamorphosis Fanatic by paying
2. When Metamorphosis Fanatic enters, it triggers, returning Lagrella from your graveyard to the battlefield
3. When Lagrella enters, it triggers, exiling Metamorphosis Fanatic until Lagrella leaves the battlefield
4. Activate Bartolomé del Presidio by sacrificing Lagrella
5. When Lagrella leaves the battlefield, Metamorphosis Fanatic is returned from exile to the battlefield
6. Repeat from step 2
7. Resolve all Bartolomé del Presidio abilities

Results

• Infinite LTB
• Infinite ETB
• Infinite sacrifice triggers
• Infinite death triggers
• Infinite +1/+1 counters on Bartolomé del Presidio