Yahenni, Undying Partisan, and Darksteel Angel

Prerequisites

• Yahenni, Undying Partisan on the battlefield
• Darksteel Angel on the battlefield

Steps

1. Activate Yahenni by sacrificing the creature with persist
2. When that creature dies, its persist ability triggers, returning it from your graveyard to the battlefield without a -1/-1 counter on it due to Darksteel Angel Resolve the Yahenni ability
3. Repeat

Results

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