Conjure Caltrops

As part of movement or a disenguagement action the caster can conjure a field of caltrops to fill the equivalent of a 5'x5' area.  Any creature besides the caster moving through the area must make a Dex save vs. the casters DC or take 1 point of peircig damage plus 1d4 acid damage.  If the save is failed the creature also has thier movement reduced by 10' until they heal at least 1 hp.  Creatures flying, floating or immaterial passing through the space are not affected.

The caltrops created last for a minute before fading from existence.