This spell may be centered on a point in space or on a creature or object. If centered on a point in space, the area is immobile. If centered on a creature or object the spell moves with the creature or object, but the target is allowed a Will save to negate the spell.

Each round a creature is within the area of the spell, it is dealt 2d6 points of cold damage (Fortitude save for half). Creatures take this damage on their round if they are within the area at any point during their turn, but take damage only once each turn. For simplicity inanimate, unattended objects are dealt damage once a round at the beginning of the turn of the spell’s caster.