Frustrated at his first real loss- aware that he only won his last fight against Wolverine via a technicality, Mister X spent several months training against other martial artists to re-learn how to fight without relying on his opponents' conscious thoughts to guide him, culminating in him killing a kindergarten teacher and challenging Wolverine to face him in the Museum of Natural History or he would kill the teacher's students. However, during the fight, Wolverine determined that Mister X's desire for the thrill of the fight could be used against him, simply refusing to fight X and relying on his healing factor to take whatever his opponent attempted to inflict on him, Wolverine leaving the museum as X was forced to face the reality of an opponent he couldn't kill who would nevertheless refuse to fight him.