Donatello, the Brains, Summoning Station, and Phantom Train

Prerequisites

• Donatello, the Brains on the battlefield
• Summoning Station on the battlefield
• Phantom Train on the battlefield

Steps

1. Activate Summoning Station by tapping it, creating a 2/2 Pincher creature token and a Mutagen token due to Donatello
2. Activate Phantom Train by sacrificing the Mutagen
3. Summoning Station triggers, untapping itself
4. Resolve the Phantom Train ability
5. Repeat

Results

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