This is the eternal kaleidoscope, sharingan. (looks like an eternal six-pointed star)
It was Sasuke's eyes that hit Kakashi and his party after the war of Tuan Zang. Sharingan was overused, leading to blindness.
Later, the masked man transplanted sharingan from Uchiha Itachi to Sasuke, who got the eternal kaleidoscope sharingan.
At the beginning, Sasuke's ability to help was almost complete.
I wish the landlord academic progress.