Eirdu, Carrier of Dawn // Isilu, Carrier of Twilight, Phantom Train, and Glint-Sleeve Artisan

Prerequisites

• Eirdu, Carrier of Dawn // Isilu, Carrier of Twilight on the battlefield
• Phantom Train on the battlefield
• Glint-Sleeve Artisan on the battlefield

Steps

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

Results

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