[Rindis]

I believe you're correct that it would disable all Magery and Sorcerous Empowerment if successful. Do note that the subject would get a HT roll to resist, and Sorcery Talent should would probably be allowed to add to HT for this (in which case, use the higher of Talent and Empowerment as spells do to resist dispelling, which would make high-power sorcerers really hard to shut down this way). Also note that DR will also add to this resistance roll unless it's done as a Malediction.