Thread:Shifūha/@comment-1399043-20141123041040/@comment-7040990-20141125104935

I'll copy Sasuke's usage:

"With his left Mangekyō, he is able to cast unquenchable black flames upon his focal point with Amaterasu. With his right Mangekyō, he is able to cast Blaze Release: Kagutsuchi to manipulate and extinguish them at will."

Blaze Release is apparently the mother technique Amaterasu. is the unique technique of Sasuke, it allows him to apply shape transformation on the flames. Furthermore, he can extinguish the flames through this. Together this allowed him to acquire Susanoo.

I'd advise to go with Blaze Release (Amaterasu) and the fanon ability, instead of going for a third one. You are still able to "move" the black flames but unable to extinguish and shape it.

To question 1: Yes, we are following the Mother Wiki's formulation.

I hope I've answered you with this, if you've any more questions related to it, feel free to ask. :)