Grinding Station + Mana Crypt + Underworld Breach

R identity

The 3 combo pieces

How to execute it

  1. Activate Mana Crypt by tapping it, adding {C}{C}.
  2. Activate Grinding Station by tapping it and sacrificing Mana Crypt, causing yourself to mill three cards.
  3. Cast Mana Crypt from your graveyard for its escape cost by exiling three cards from your graveyard.
  4. Grinding Station triggers, untapping itself.
  5. Repeat.

What the combo produces