Mortuary, Bolas's Citadel, Dross Harvester, and Myr Scrapling

Prerequisites

• Mortuary on the battlefield
• Bolas's Citadel on the battlefield
• Dross Harvester on the battlefield
• Myr Scrapling on the battlefield

Steps

1. Activate Myr Scrapling by sacrificing it
2. When Myr Scrapling dies, Mortuary and Dross Harvester trigger
3. Resolve the Mortuary trigger, putting Myr Scrapling from your graveyard onto the top of your library
4. Resolve the Dross Harvester trigger, causing you to gain 2 life Cast Myr Scrapling from the top of your library by paying 1 life
5. Repeat

Results

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