Unstoppable Slasher, Solemnity, and Yahenni, Undying Partisan

Prerequisites

• Unstoppable Slasher on the battlefield
• Solemnity on the battlefield
• Yahenni, Undying Partisan on the battlefield
• Unstoppable Slasher does not have a counter on it

Steps

1. Activate Yahenni by sacrificing Unstoppable Slasher
2. When Unstoppable Slasher dies, its second ability triggers, returning it from your graveyard to the battlefield with zero stun counters due to Solemnity
3. Resolve the Yahenni ability
4. Repeat

Results

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