Constitution score increases by 2 and Strength score increases by 1.

you are vulnerable to cold damage.

Whenever you are subjected to fire damage, you take no damage and regain a number of hit points equal to the fire damage dealt.

As a reaction to a creature touching or hitting you with a melee attack while within 5 ft., you can make a melee attack (proficiency + constitution modifier) to blast them with fire, for 5 (1d10) fire damage plus your constitution modifier on a hit. You can’t use this feature again until you finish a long rest.

You can shed a bright light in a 30-foot radius and dim light for an additional 10 feet. You can reduce your flame to produce an aura of dim light in a 5-foot radius.

you can speak, read and write Common.