Blade Barrier

Action: 1 / Target: 1 / Rng: Mid / Save: Ref
Mats: V,S / Duration: 1min/lvl / Spell Resist: Y
Create a wall of whirling blades 20ft long/lvl or
a ringed wall of blades radius of 5ft/2 lvl each is
20ft high . Any creature passing takes 1d6/caster
lvl(Max 15d6) with Ref Save for 1/2. Blades
provide cover(+4 bonus AC, +2 Ref saves)
from attacks made through it.