Blue and Red Crystals dot the landscape of Darksiders, often blocking access to key areas. Red crystals are explosive and fire or an active bomb must be used to destroy them. Blue crystals can be smashed after War gains the Tremor Gauntlet in The Hollows, by charging up the gauntlet (360: Hold Y PS3: Hold Triangle). The boss fight against The Griever occurs in a room full of blue crystals which block the path of a train carriage needed to smash the boss with. The Griever fires beams from her mouth which can be avoided by hiding behind the crystals, however when her beam hits the crystals, they heat up and turn red (there is no bombs in the room to destroy them with) for a short while.