Mortuary, Bolas's Citadel, Carrion Feeder, and Vindictive Vampire

Prerequisites

• Mortuary on the battlefield
• Bolas's Citadel on the battlefield
• Carrion Feeder on the battlefield
• Vindictive Vampire on the battlefield

Steps

1. Activate Carrion Feeder by sacrificing it
2. When Carrion Feeder dies, Mortuary and Vindictive Vampire trigger
3. Resolve the Mortuary trigger, putting Carrion Feeder from your graveyard onto the top of your library
4. Resolve the Vindictive Vampire trigger, causing you to gain 1 life and dealing 1 damage to each opponent
5. Resolve the Carrion Feeder ability
6. Cast Carrion Feeder from the top of your library by paying 1 life
7. Repeat

Results

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