Xathrid Necromancer, Xenograft, and Yahenni, Undying Partisan

Prerequisites

• Xathrid Necromancer on the battlefield
• Xenograft on the battlefield
• Yahenni, Undying Partisan on the battlefield

Steps

1. Activate Yahenni by sacrificing any other creature
2. When the creature dies as a Human due to Xenograft, Xathrid Necromancer triggers, creating a 2/2 Zombie creature token
3. Resolve the Yahenni ability
4. Repeat

Results

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