Fiery Aura. At the end of each of the elemental's turns, each creature in a 10-foot Emanation originating from the elemental takes 5 (1d10) Fire damage. Creatures and flammable objects in the Emanation start burning.
Fire Form. The elemental can move through a space as narrow as 1 inch wide without expending extra movement to do so, and it can enter a creature's space and stop there. The first time it enters a creature's space on a turn, that creature takes 5 (1d10) Fire damage.
Illumination. The elemental sheds Bright Light in a 30-foot radius and Dim Light for an additional 30 feet.
Water Susceptibility. The elemental takes 3 (1d6) Cold damage for every 5 feet the elemental moves in water or for every gallon of water splashed on it.
Multiattack. The elemental makes two Burn attacks.
Burn. Melee Attack Roll: +6, reach 5 ft. Hit: 10 (2d6 + 3) Fire damage. If the target is a creature or a flammable object, it starts burning.