Blaine the Mono is a demented monorail train appearing in The Waste Lands and Wizard and Glass. Originally serving as public transit in the city of Lud with his partner, another monorail with female characteristics, he slowly went insane after the world went into decline and the despondent female monorail committed suicide. Roland and his ka-tet have to ride this psychopathic train in order to travel safely in the Wastelands. The train seems to be connected to the children's book found by Jake, Charlie the Choo-Choo. Before Blaine lets Roland and his ka-tet on board, he kills every single living thing in the city of Lud with poison gas. Blaine reveals to the ka-tet that he plans to destroy himself along with the ka-tet, he promises to let them live on one condition, the ka-tet must beat him in a riddling contest. If he cannot answer one riddle they ask him, he will not destroy himself with the ka-tet on board. It becomes clear that Blaine has a huge library of riddles from many different levels of the tower at his disposal, and programs to decipher the riddle's wordplays or hidden clues, so the game seems doomed. Eddie eventually stumps Blaine with unsolvable and exceedingly stupid jokes humans sometimes make. This forces Blaine to try to "lower" his intelligence to levels necessary to answer, which ends up driving him completely insane and causes his computer to crash. Eddie then proceeds to shoot Blaine's main computer, which causes the train to crash, killing Blaine.