Lurrus of the Dream-Den, Flickering Hound, Crimson Kobolds, and Phantom Train

Prerequisites

• Lurrus of the Dream-Den on the battlefield
• Flickering Hound on the battlefield
• Crimson Kobolds in hand or in the graveyard
• Phantom Train on the battlefield

Steps

1. Cast Crimson Kobolds by paying
2. Flickering Hound triggers, blinking Lurrus
3. Resolve the Crimson Kobolds spell
4. Then, activate Phantom Train by sacrificing Crimson Kobolds, putting a +1/+1 counter on Phantom Train and causing it to become a creature until end of turn Repeat

Results

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