Ob Nixilis, Captive Kingpin, Mortuary, Footlight Fiend, and Thermopod

Prerequisites

• Ob Nixilis, Captive Kingpin on the battlefield
• Mortuary on the battlefield
• Footlight Fiend on the battlefield
• Thermopod on the battlefield

Steps

1. Activate Thermopod's second ability by sacrificing Footlight Fiend, adding
2. When Footlight Fiend dies, it and Mortuary trigger
3. Resolve the Mortuary trigger, putting Footlight Fiend on top of your library from your graveyard
4. Resolve the Footlight Fiend trigger, dealing 1 damage to an opponent
5. Ob Nixilis triggers, putting a +1/+1 counter on itself, and exiling Footlight Fiend from the top of your library with the ability to play it until your end step
6. Cast Footlight Fiend from exile by paying
7. Repeat

Results

• Infinite +1/+1 counters on Ob Nixilis
• Infinite damage
• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite sacrifice triggers
• Infinite storm count