Metamorphosis Fanatic, Bloodflow Connoisseur, and Lagrella, the Magpie

Prerequisites

• Metamorphosis Fanatic in hand
• Bloodflow Connoisseur 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 Bloodflow Connoisseur 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 Bloodflow Connoisseur abilities

Results

• Infinite LTB
• Infinite ETB
• Infinite sacrifice triggers
• Infinite death triggers
• Infinite +1/+1 counters on Bloodflow Connoisseur