Nether Traitor, Kheru Goldkeeper, Teval, the Balanced Scale, and Phantom Train

Prerequisites

• Nether Traitor on the battlefield
• Kheru Goldkeeper on the battlefield
• Teval, the Balanced Scale on the battlefield
• Phantom Train on the battlefield
• available

Steps

1. Activate Phantom Train by sacrificing Nether Traitor
2. Activate Phantom Train by sacrificing another creature
3. When the creature dies, Nether Traitor triggers, causing you to pay to return Nether Traitor from your graveyard to the battlefield
4. Kheru Goldkeeper and Teval triggers, creating a Treasure token and a creature token Resolve the Phantom Train ability
5. Activate the Treasure by tapping and sacrificing it, adding
6. Repeat

Results

• Infinite +1/+1 counters on a creature
• Infinite ETB
• Infinite LTB
• Infinite death triggers
• Infinite sacrifice triggers