Archon of Falling Stars, Necromancy, and Phantom Train

Prerequisites

• Archon of Falling Stars on the battlefield
• Necromancy in the graveyard
• Phantom Train on the battlefield

Steps

1. Activate Phantom Train by sacrificing Archon of Falling Stars
2. When Archon of Falling Stars dies, it triggers, returning Necromancy from your graveyard to the battlefield
3. When Necromancy enters the battlefield, it triggers, returning Archon of Falling Stars from your graveyard to the battlefield, and attaching Necromancy to it
4. Resolve the Phantom Train ability Repeat

Results

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