[quote=@RIGHTEOUSwench]
Ohh, like a barrier? Yeah, he mentions that being possible in the Luminosity section too. I imagine it'd be a constant mana sap though. 

[/quote]

Kind of, but more natural. For instance, have you known a person that walks into the room and immediately changes the atmosphere? Either in a good or bad way, but the feel of the room is ultimately changed. As such, would a person with a strong enough aura actually repel magic naturally just by their force of spirit or force of their attunement to luminosity.