Grinding Station + Luminous Broodmoth + Nardole, Resourceful Cyborg

WU identity

Commander legal

The 3 combo pieces

• Grinding Station
• Luminous Broodmoth
• Nardole, Resourceful Cyborg

How to execute it

1. Activate Grinding Station by tapping it and sacrificing Nardole.
2. When Nardole dies, its undying ability triggers if it didn't have a +1/+1 counter, and Luminous Broodmoth triggers if Nardole didn't have flying.
3. Resolve the undying trigger, if applicable, returning Nardole from your graveyard to the battlefield with either a +1/+1 counter on it.
4. If Nardole entered the battlefield in step 3, Grinding Station triggers, untapping Grinding Station.
5. Resolve the Luminous Broodmoth trigger, if applicable, returning Nardole from your graveyard to the battlefield with a flying counter on it if the creature is still in your graveyard.
6. If Nardole entered the battlefield in step 5, Grinding Station triggers, untapping Grinding Station.
7. Resolve the Grinding Station ability from step 1.
8. Repeat.

What the combo produces

• Infinite creature LTB
• Infinite death triggers
• Infinite ETB
• Infinite mill
• Infinite sacrifice triggers
• Infinite self-mill