Fire Form. The elemental can move through a space as narrow as 1 inch wide without squeezing. A creature that touches the elemental or hits it with a melee attack while within 5 feet of it takes 5 (1d10) fire damage. In addition, the elemental can enter a hostile 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 and catches fire; until someone takes an action to douse the fire, the creature takes 5 (1d10) fire damage at the start of each of its turns.

Illumination. The elemental sheds bright light in a 30-foot radius and dim light in an additional 30 feet.

Darkness Susceptibility. The Elemental relies on direct light for its power, in dim light (ignoring its own) it has disadvantage on attack rolls and skill checks, in darkness people get advantage on attack rolls against it.

Power through Illumination. In direct sunlight the elemental gets advantage on attack rolls, and as a action may heal itself 3d10 health (1 charge, recharges on 6)

Multiattack. The elemental makes two touch attacks.

Touch. Melee Weapon Attack: +6 to hit, reach 5 ft., one target. Hit: 10 (1d6 + 3) fire damage. If the target is a creature or a flammable object, it ignites. Until a creature takes an action to douse the fire, the target takes 5 (1d10) fire damage at the start of each of its turns.