Well, whatever rank that Noble Phantasm would be, any magical skill or NP at a lower rank wouldn't function in his presence... but compared to many of the other figures who are summons in that setting, he's not that big a deal, so that wouldn't be that useful. Maybe expressed magic in general? That would at least shut down spell casters other than an actual Caster and the Masters.
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‎noli esse culus
‎noli esse culus