Archon of Falling Stars, Necromancy, and Yahenni, Undying Partisan

Prerequisites

• Archon of Falling Stars on the battlefield
• Necromancy in the graveyard
• Yahenni, Undying Partisan on the battlefield

Steps

1. Activate Yahenni by sacrificing Archon of Falling Stars
2. When Archon of Falling Stars dies, it triggers, returning Necromancy from your graveyard to the battlefield
3. When Necromancy enters the battlefield, it triggers, returning Archon of Falling Stars from your graveyard to the battlefield, and attaching Necromancy to it
4. Resolve the Yahenni ability, giving it indestructible until end of turn
5. Repeat

Results

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