Mortuary, Vindictive Vampire, Bolas's Citadel, and Accursed Centaur

Prerequisites

• Mortuary on the battlefield
• Vindictive Vampire on the battlefield
• Bolas's Citadel on the battlefield
• Accursed Centaur in hand or on the battlefield
• available

Steps

1. Cast Accursed Centaur by paying its mana cost
2. When Accursed Centaur enters, it triggers, sacrificing itself
3. When Accursed Centaur dies, Mortuary and Vindictive Vampire trigger
4. Resolve the Mortuary trigger, putting Accursed Centaur from your graveyard onto the top of your library
5. Resolve the Vindictive Vampire trigger, causing you to gain 1 life and dealing 1 damage to each opponent Cast Accursed Centaur from the top of your library by paying 1 life
6. Repeat from step 2

Results

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