Mortuary, Bolas's Citadel, Myr Scrapling, and Blood Artist

Prerequisites

• Mortuary on the battlefield
• Bolas's Citadel on the battlefield
• Myr Scrapling on the battlefield
• Blood Artist on the battlefield

Steps

1. Activate Myr Scrapling by sacrificing it
2. When Myr Scrapling dies, Mortuary and Blood Artist trigger
3. Resolve the Mortuary trigger, putting Myr Scrapling from your graveyard onto the top of your library
4. Resolve the Blood Artist trigger, causing you to gain 1 life and target opponent to lose 1 life
5. Resolve the Myr Scrapling ability
6. Cast Myr Scrapling from the top of your library by paying 1 life
7. Repeat

Results

• Infinite LTB
• Infinite ETB
• Infinite sacrifice triggers
• Infinite death triggers
• Infinite lifegain triggers
• Infinite storm count
• Infinite lifeloss
• Infinite +1/+1 counters