Otiluke's Dispelling Screen
(Evocation, Abjuration)

Range: 5 yards/level
Components: V, S, M
Duration: 1 round/level
Casting Time: 5
Area of Effect: 20-foot square
Saving Throw: None

 This spell creates a shimmering screen of violet energy in any shape the caster desires.  Any creature passing through the screen is affected by dispel magic with the same level of effectiveness as that spell cast by the wizard.   The material components for this spells are a sheet of fine lead crystal and a chysolite gemstone worth 1,000 gp (both vanish after the spell is cast).