Darien, King of Kjeldor, Havoc Jester, Healer of the Pride, and Yahenni, Undying Partisan

Prerequisites

• Darien, King of Kjeldor on the battlefield
• Havoc Jester on the battlefield
• Healer of the Pride on the battlefield
• Yahenni, Undying Partisan on the battlefield

Steps

1. Activate Yahenni by sacrificing a creature
2. When the creature dies, Havoc Jester triggers, dealing 1 damage to you
3. Darien triggers, creating a 1/1 Soldier creature token
4. When the Soldier enters, Healer of the Pride triggers, causing you to gain life Resolve the Yahenni ability
5. Repeat

Results

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