I had a conceptual itch that the Eldritch Emissary* template happened to scratch perfectly, except for on little thing: Antimagic Susceptibility
Antimagic Vulnerability (Su): Because an eldritch emissary is a magical projection of a place of power, it is vulnerable to antimagic spells and spell-like effects as if it were a summoned creature. Any antimagic effect must first overcome the emissary’s spell resistance. A dispel magic spell that overcomes the emissary’s spell resistance will force it to discorporate for 1d4 rounds as if it were a suppressed magic item.
Emphasis mine.
But AMFs suppress Supernatural abilities... So do I vanish when I walk into one, or is that part of AMS redundant?
*Look in Towers of High Sorcery, p148 for further details.