Grinding Station + Underworld Breach

R identity

Commander legal

The 2 combo pieces

• Grinding Station
• Underworld Breach

How to execute it

1. Activate Grinding Station by tapping it and sacrificing the artifact with mana value 0, causing you to mill three cards.
2. Cast the artifact from your graveyard for its escape cost by paying {0} and exiling three cards from your graveyard.
3. When the artifact enters the battlefield, Grinding Station triggers, untapping Grinding Station.
4. Repeat.

What the combo produces

• Infinite self-mill
• Near-infinite mana among colors of legendary creatures and planeswalkers you control
• Near-infinite storm count