okay how about this..
During the timeskip, Kakashi further improved his Sharingan by developing his own Mangekyō Sharingan through unknown means. Furthermore, he has mastered his only known Mangekyō jutsu called Kamui. This jutsu has the ability to manipulate space, and was shown to be able to suck targets or even tear off parts of a target and hurl them into another dimension. When used against Deidara, he noted Kakashi's dōjutsu to be of Itachi's caliber, who was infamous for his prowess with Mangekyō jutsu. Despite Kakashi mentioning that his prowess with it is incomplete, as shown from his difficulty in using it against Deidara, his skill with it was later great enough to target a small speeding target with no effect on any other targets. However, this technique used so much chakra that he had to be hospitalized for a week after using it three times in one day. Kakashi shows no signs of deteriorating eye sight from the use of his Mangekyo eye, as Madara, Itachi, and Sasuke have.
