Can't Cultivate? I Awakened the Sharingan from the Start

The pace is a little slow at first, but it gets really good later. If you don't like it, come hit me.

Su Ye transmigrates to a cultivation world, but because he has a body devoid of spiritual energy, he can't cultivate. Yet there's always a way forward. Su Ye awakens the Sharingan System and continually upgrades his Sharingan, starting with one tomoe, progressing to the blooming Mangekyo, and eventually awakening the Rinnegan.

Other cultivators use spells to fight and kill their enemies? I just unleash Amaterasu, and its inextinguishable black flames burn everything to ashes.

You want to attack my mind? I activate Tsukuyomi and trap you in a mental hell.

You think your defense is invincible? My Perfect Susanoo appears and crushes it with sheer power!