Mortuary, Phantom Train, Serrated Scorpion, and Gwenom, Remorseless

Prerequisites

• Mortuary on the battlefield
• Phantom Train on the battlefield
• Serrated Scorpion in hand
• Gwenom, Remorseless on the battlefield

Steps

1. Activate Phantom Train by sacrificing Serrated Scorpion
2. When Serrated Scorpion dies, it and Mortuary triggers
3. Resolve the Mortuary trigger, putting Serrated Scorpion from your graveyard onto the top of your library
4. Resolve the Serrated Scorpion trigger, causing you to gain 2 life and dealing 2 damage to each opponent
5. Resolve the Phantom Train ability
6. Cast Serrated Scorpion from the top of your library by paying 1 life due to Gwenom
7. Repeat

Results

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