Celes, Rune Knight, and Yahenni, Undying Partisan

Prerequisites

• Celes, Rune Knight on the battlefield
• Yahenni, Undying Partisan on the battlefield
• undefined

Steps

1. Activate Yahenni by sacrificing the persist creature
2. When the persist creature dies, its persist ability triggers, returning it from your graveyard to the battlefield with a -1/-1 counter on it
3. When the persist creature enters the battlefield, Celes's second ability triggers, putting a +1/+1 counter on each creature you control
4. Resolve the Yahenni ability
5. Repeat

Results

• Infinite LTB
• Infinite ETB
• Infinite sacrifice triggers
• Infinite death triggers
• Infinite +1/+1 counters