Thornbite Staff, Godsire, and Phantom Train

Prerequisites

• Thornbite Staff on the battlefield
• Godsire on the battlefield
• Phantom Train on the battlefield

Steps

1. Activate Godsire by tapping it, creating a creature token
2. Activate Phantom Train by sacrificing the creature token
3. When the creature token dies, Godsire triggers due to its ability granted to it by Thornbite Staff, untapping Godsire
4. Resolve the Phantom Train ability, 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