Angel of Indemnity, Yahenni, Undying Partisan, and Icewind Stalwart

Prerequisites

• Angel of Indemnity on the battlefield
• Yahenni, Undying Partisan on the battlefield
• Icewind Stalwart in hand
• You have enough mana to cast Icewind Stalwart

Steps

1. Cast Icewind Stalwart by paying its mana cost
2. When Icewind Stalwart enters the battlefield, it triggers, targeting Metamorphosis Fanatic
3. Holding priority, activate Yahenni by sacrificing Icewind Stalwart
4. Resolve the Icewind Stalwart ability, blinking Metamorphosis Fanatic
5. When Metamorphosis Fanatic enters the battlefield, it triggers, returning Icewind Stalwart from your graveyard to the battlefield
6. Repeat from step 2

Results

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