Mortuary, Bolas's Citadel, Myr Scrapling, and Vindictive Vampire

Prerequisites

• Mortuary on the battlefield
• Bolas's Citadel on the battlefield
• Myr Scrapling on the battlefield
• Vindictive Vampire on the battlefield

Steps

1. Activate Myr Scrapling by sacrificing it
2. When Myr Scrapling dies, Mortuary and Vindictive Vampire trigger
3. Resolve the Mortuary trigger, putting Myr Scrapling from your graveyard onto the top of your library
4. Resolve the Vindictive Vampire trigger, causing you to gain 1 life and dealing 1 damage to each opponent
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 damage
• Infinite lifegain triggers
• Infinite storm count
• Infinite +1/+1 counters