Bolas's Citadel, Mortuary, and Ravenous Baloth

Prerequisites

• Bolas's Citadel on the battlefield
• Mortuary on the battlefield
• Ravenous Baloth on the battlefield

Steps

1. Activate Ravenous Baloth by sacrificing itself
2. When Ravenous Baloth dies, Mortuary triggers, putting Ravenous Baloth on top of your library from your graveyard
3. Resolve the Ravenous Baloth ability, causing you to gain 4 life
4. Cast Ravenous Baloth from the top of your library by paying 4 life
5. Repeat

Results

• Infinite death triggers
• Infinite ETB
• Infinite lifegain triggers
• Infinite LTB
• Infinite sacrifice triggers