susanoo obito

Obito had already given Kakashi his left eye by the time he awakened Mangekyou Sharingan, thus couldn't use Susano'o. obito rin kakashi Obito is later seen to get back both of his Sharingan, but since he awakened it before he had both, I guess the eyes could no longer be seen as a "vessel" for Susano'o to be used