MTG >Combos >Grinding Station +Mox Amber +Underworld Breach +

You need to have enough cards in your graveyard to recast Mox Amber repeatedly Tap Mox Amber to add a mana of any color Sacrifice Mox Amber with Grinding Station to mill 3 cards from the opponent's deck Cast Mox Amber from your Graveyard for the Escape cost Grinding Station's ability will trigger, untap it Repeat the process for infinite mill