Board Thread:Wiki Discussions/@comment-1514283-20140911040828/@comment-1514283-20140912000624

Elveonora, it's been well established that TSB and SPST are related, not the former is derived from the later. Kaguya possessed this power before her sons were even born.

This argument is going off on a tangent anyway.

We know TSB is a Kekkei Mōra, so the parameter should be added an included for all users, just like with Kekkei Tōta. I personally don't believe TSB is lacking its "X Release," given how it's been around for 50 chapters and it's been manipulated for a number of purposes already, so I believe the Kekkei Mōra parameter can be filled with TSB. At least until the manga sheds more light, if that will even happen.