Lurrus of the Dream-Den, Kaya's Ghostform, Pitiless Plunderer, and Phantom Train

Prerequisites

• Lurrus of the Dream-Den on the battlefield
• Kaya's Ghostform on the battlefield
• Pitiless Plunderer on the battlefield
• Phantom Train on the battlefield

Steps

1. Activate Phantom Train by sacrificing Lurrus of the Dream-Den
2. When Lurrus of the Dream-Den dies, Kaya's Ghostform and Pitiless Plunderer trigger
3. Resolve the Kaya's Ghostform trigger, returning Lurrus of the Dream-Den from your graveyard to the battlefield
4. Resolve the Pitiless Plunderer trigger, creating a Treasure token
5. Resolve the Phantom Train ability Activate the Treasure by tapping and sacrificing it, adding
6. Cast Kaya's Ghostform from your graveyard by paying , attaching it to Lurrus of the Dream-Den
7. Repeat

Results

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