The ring wouldn't work within the area under the invisibility purge; it would work as normal after leaving the invisibility is suppressed not dispelled.<br/>Of course it's Zaer's call since hes the GM.  :-)<br/><br/><br/><strong>Invisibility Purge</strong><br/>Evocation<br/>Level:    Clr 3<br/>Components:    V, S<br/>Casting Time:    1 standard action<br/>Range:    Personal<br/>Target:    You<br/>Duration:    1 min./level (D)<br/><br/>You surround yourself with a sphere of power with a radius of 5 feet per caster level that negates all forms of invisibility.<br/>Anything invisible becomes visible while in the area.