Lycanthropy was just a B-rank talent, and it was a relatively common body transformation talent. After activation, it greatly enhanced the strength of the user's body, and also enhanced recovery abilities. Normally, those talents that were limited by time were not rated very highly, and the werewolf form itself had some side effects -- namely that it was very easy to lose control after activating it.
However, King Lycanthropy was different; it was an S-rank talent, and possessed all the abilities of Lycanthropy, but stronger. The talent also had a passive ability that greatly increased all the user's attributes when the user was injured. That ability greatly increased when the talent was activated as well, which meant that, whenever the user received grave injuries, the user could very easily break past their own physical limits, and could even compete with those with SS-rank talents!
