Mortuary, Bolas's Citadel, Bile Urchin, and Vindictive Vampire

Prerequisites

• Mortuary on the battlefield
• Bolas's Citadel on the battlefield
• Bile Urchin on the battlefield
• Vindictive Vampire on the battlefield

Steps

1. Activate Bile Urchin by sacrificing it
2. When Bile Urchin dies, Mortuary and Vindictive Vampire trigger
3. Resolve the Mortuary trigger, putting Bile Urchin 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 Bile Urchin ability
6. Cast Bile Urchin 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
• Infinite lifeloss