Mortuary, Bolas's Citadel, Skirk Prospector, and Venerated Stormsinger

Prerequisites

• Mortuary on the battlefield
• Bolas's Citadel on the battlefield
• Skirk Prospector on the battlefield
• Venerated Stormsinger on the battlefield

Steps

1. Activate Skirk Prospector by sacrificing it
2. When Skirk Prospector dies, Mortuary and Venerated Stormsinger trigger
3. Resolve the Mortuary trigger, putting Skirk Prospector from your graveyard onto the top of your library
4. Resolve the Venerated Stormsinger trigger, causing you to gain 1 life and each opponent to lose 1 life
5. Cast Skirk Prospector from the top of your library by paying 1 life
6. Repeat

Results

• Infinite LTB
• Infinite ETB
• Infinite sacrifice triggers
• Infinite death triggers
• Infinite lifegain triggers
• Infinite storm count
• Infinite red mana
• Infinite lifeloss