Mortuary, Aetherflux Reservoir, Phantom Train, and Gwenom, Remorseless

Prerequisites

• Mortuary on the battlefield
• Aetherflux Reservoir on the battlefield
• Phantom Train on the battlefield
• Gwenom, Remorseless on the battlefield

Steps

1. Activate Phantom Train by sacrificing a creature When the creature dies, Mortuary triggers, putting the creature from your graveyard onto the top of your library
2. Resolve the Phantom Train ability
3. Cast the creature from the top of your library by paying X life, where X is the creature's mana value
4. Aetherflux Reservoir triggers, causing you to gain 1 life for each spell you've cast this turn
5. Repeat

Results

• Infinite LTB
• Infinite ETB
• Infinite sacrifice triggers
• Infinite death triggers
• Infinite lifegain triggers
• Infinite lifegain
• Infinite storm count
• Infinite +1/+1 counters on a creature
• Infinite damage