Otiluke's Dispelling Screen

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 spell vanish after the spell is cast.

[Complete Wizard's Handbook]

School: Evocation, Abjuration
Level: 4
Rarity: Rare

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

Material Components:
a sheet of fine lead crystal and a chrysolite gemstone worth 1,000 gp