Polymorph (Small Fire Elemental)

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