Blade Barrier

Description
Blade Barrier brings into being a 30-ft long and 3-ft wide wall of whirling blades. All those passing through the wall take 1d6 points of slashing damage per caster level (maximum of 15d6).

The Blade Barrier can also be cast as a 30-ft diameter curtain of blades surrounding the caster. Anything caught in the blades takes 1d6 points of slashing damage per caster level (maximum of 15d6). When the spell is used this way, the duration is halved (6 seconds for every two caster levels).