Ambitious Aetherborn + Eirdu, Carrier of Dawn // Isilu, Carrier of Twilight + Phantom Train

WB identity

Commander legal

The 3 combo pieces

• Ambitious Aetherborn
• Eirdu, Carrier of Dawn // Isilu, Carrier of Twilight
• Phantom Train

How to execute it

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

What the combo produces

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