Wall of Dispel Magic

(Spell Compendium, page 233, DnD 3.5)

Abjuration

Level: ; Cleric 5; Sorcerer/Wizard 5
Components: V, S
Casting Time: 1 standard action
Range: Close (25 ft. + 5 ft./2 levels)
Effect: A straight wall whose area is up to one 10-ft. square/level
Duration: 1 minute/level
Saving Throw: None
Spell Resistance: No

You cast the spell and a translucent wall springs up, a shimmering field of faded colors that swirls and merges with itself like the surface of a soap bubble.

This spell creates a transparent, permeable barrier. Anyone passing through it becomes the target of a dispel magic effect (PH 223) at your caster level. A summoned creature targeted in this way can be dispelled by the effect.

A wall of dispel magic cannot be seen or felt by ordinary means, or even with a see invisibility spell. Detect magic indicates the presence of the effect, and true seeing reveals its presence.