Invisibility Purge

Player's Handbook v.3.5 (PH)Core (3.5)
School
Evocation
Casting Time
1 standard action
Components
V, S
Range
Personal
Target
The caster
Duration
1 minute/level (D)
Saving Throw
None (harmless)
Spell Resistance
No (harmless)

Related

You surround yourself with a sphere of power with a radius of 5 feet per caster level that negates all forms of invisibility. Anything invisible becomes visible while in the area.