Polymorph (Small Water Elemental)

The target creature becomes a small water elemental. It gains a +2 size bonus to its Constitution, a +4 form natural armor bonus to AC, resist cold 20, and vulnerability to fire. Its movement speed is reduced by 10 feet. It also gains one 1d6 slam attack and the freeze ability. The subject may choose to resume its normal form as a full-round action; doing so ends the spell for that subject. Freeze: A water elemental deals 1d4 cold damage in addition to damage dealt on a successful hit in melee. Those affected by the freeze ability must also succeed at a Reflex save or start freezing, taking 1d4 damage each round for an additional 1d4 rounds. Creatures that hit a freezing creature with natural weapons or unarmed attacks take cold damage as though hit by the freezing creature and must make a Reflex save to avoid freezing.