Solemnity, and Yahenni, Undying Partisan

Prerequisites

• Solemnity on the battlefield
• Yahenni, Undying Partisan on the battlefield
• undefined

Steps

1. Activate Yahenni by sacrificing the persist or undying creature
2. When the creature dies, its persist or undying ability triggers, returning it from your graveyard to the battlefield without a -1/-1 counter or a +1/+1 counter on it due to Solemnity
3. Resolve the Yahenni ability
4. Repeat

Results

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