Board Thread:Questions and Answers/@comment-27606805-20160114003153/@comment-29183117-20160114004516

CInderz wrote: His soul is similar to kyorakus in a way that they both have extremely unique abilities. Katen Kyokotsu being based on kyorakus soul, and starrk being able to alter His soul and reiatsu and make them one. ...how exactly is Shunsui's Zanpakuto being based on his soul different from any other Shinigami? That's like saying that Grimmjow's Resurreccion is unique because it's based on his Hollow form. It's not a unique trait.

And seeing as how this is on the questions and answers forum...what exactly is your question here?