Mortuary, Crimson Kobolds, Bolas's Citadel, and Yahenni, Undying Partisan

Prerequisites

• Mortuary on the battlefield
• Crimson Kobolds on the battlefield
• Bolas's Citadel on the battlefield
• Yahenni, Undying Partisan on the battlefield

Steps

1. Activate Yahenni by sacrificing Crimson Kobolds When Crimson Kobolds dies, Mortuary triggers, putting Crimson Kobolds from your graveyard onto the top of your library
2. Resolve the Yahenni ability
3. Cast Crimson Kobolds from the top of your library by paying 0 life
4. Repeat

Results

• Infinite LTB
• Infinite ETB
• Infinite sacrifice triggers
• Infinite death triggers
• Infinite storm count