Non-Spell techs for shinigami

Well, the non-spells in the custom registration section applies for kido techniques that aren’t spell based.

Senka is a shunpo related technique used and most likely created by Kuchiki Byakuya himself, so I assume someone must be trained by him in order to have it.

As for Utsusemi, it's seemingly a shunpo related tech too, taught to Byakuya by Yoruichi.