Mortuary, Deathgreeter, Bolas's Citadel, and Accursed Centaur

Prerequisites

• Mortuary on the battlefield
• Deathgreeter on the battlefield
• Bolas's Citadel on the battlefield
• Accursed Centaur in hand
• 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 Deathgreeter trigger
4. Resolve the Mortuary trigger, putting Accursed Centaur from your graveyard onto the top of your library
5. Resolve the Deathgreeter trigger, causing you to gain 1 life 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 creature sacrifice triggers
• Infinite death triggers
• Infinite lifegain triggers
• Infinite storm count