Mortuary, Aetherflux Reservoir, Gwenom, Remorseless, and Yahenni, Undying Partisan

Prerequisites

• Mortuary on the battlefield
• Aetherflux Reservoir on the battlefield
• Gwenom, Remorseless on the battlefield
• Yahenni, Undying Partisan on the battlefield

Steps

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

Results

• Infinite LTB
• Infinite ETB
• Infinite sacrifice triggers
• Infinite death triggers
• Infinite lifegain triggers
• Infinite lifegain
• Infinite storm count
• Infinite damage