Barrier Bracers

3/day the wearer can activate these bracers.  The next spell the wearer casts instead is turned into a 10ft x 10ft x 3ft (WxHxD) thick wall of opaque energy.  The wall must have a point adjacent to the wearer.  The wall lasts 1 round/spell level, or until the bracers are deactivated, whichever happens first.  Any creature that comes into contact with the wall must make a reflex save or take damage equal to that of the origin spell, a successful save halves damage.

Notes: Ritual