Wingrattle Scarecrow, Thran Vigil, and Phantom Train

Prerequisites

• Wingrattle Scarecrow on the battlefield
• Thran Vigil on the battlefield
• Phantom Train on the battlefield

Steps

1. Activate Phantom Train by sacrificing Wingrattle Scarecrow
2. When Wingrattle Scarecrow dies, its persist ability triggers, returning it from your graveyard to the battlefield with a -1/-1 counter on it
3. Thran Vigil triggers, putting a +1/+1 counter on Wingrattle Scarecrow
4. Resolve the Phantom Train ability
5. Repeat

Results

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