Eirdu, Carrier of Dawn // Isilu, Carrier of Twilight + Phantom Train + Solemnity

WB identity

Commander legal

The 3 combo pieces

• Eirdu, Carrier of Dawn // Isilu, Carrier of Twilight
• Phantom Train
• Solemnity

How to execute it

1. Activate Phantom Train by sacrificing another nontoken creature without a -1/-1 counter on it.
2. When the creature dies, its persist ability triggers, returning it from your graveyard to the battlefield without a -1/-1 counter on it due to Solemnity.
3. Resolve the Phantom Train ability.
4. Repeat.

What the combo produces

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