 Morty needs this ghostly army, as he is frequently attacked by, and eventually captured by, hordes of wraiths under the command of an old enemy (later revealed to be the spirit of the Corpsetaker).He displays unexpected depths of courage during his captivity and torture.The true extent of his power is revealed at the end of the story when he seizes control of a vast horde of wraiths and unleashes them to annihilate the Corpsetaker.