Eirdu, Carrier of Dawn // Isilu, Carrier of Twilight + Phantom Train + Propeller Pioneer

WB identity

Commander legal

The 3 combo pieces

• Eirdu, Carrier of Dawn // Isilu, Carrier of Twilight
• Phantom Train
• Propeller Pioneer

How to execute it

1. Activate Phantom Train by sacrificing Propeller Pioneer.
2. When Propeller Pioneer dies, its persist ability triggers, returning it from your graveyard to the battlefield with a -1/-1 counter on it.
3. When Propeller Pioneer 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