dozens of krauls burst from their open chamber and attack a series of unsuspecting mogs from behind ; several pikens stomp into the tunnel with roars and swinging arms ; the reptilian mutant with horns charges towards the back of the tunnel , plowing over mogs and krauls under the legs of the pikens ; the gargoylelike winged creatures buzz at the ceiling , swooping down to take a bite out of anything they can ; and the monster with transparent skin sinks its rows of teeth into the calf of a piken .