Frost Elf (5e Subrace)
From D&D Wiki
Frost elves are found in the depths of Icewind Dale. They are very pale white skinned almost blue with eyes the color of silver blue and white their hair can range to the same color. Frost elves are elves that were drawn to Icewind Dale and, due to their inquisitive nature, they adapted to the harsh climate of the frozen wastes and developed their own society, and act that, however, distanced them from society, eventually causing them to become isolated. The frost elves are curious and charming, and they will get close to other creatures and get any answers they may want, however due to their isolation they are sometimes unwise about their choices.
Ability Score Increase. Your Charisma and Intelligence increase by 1. Your Constitution decreases by 1.
Frozen Skin. You are resistant to cold damage and you don't suffer the negative effects of extreme cold.
Glacial Homeland. You are adapted to the Arctic. You ignore difficult terrain caused by ice or snow.
Heat Sensibility. You are vulnerable to fire damage, and you have disadvantage on Constitution checks and saving throws to resist the effects of extreme cold.
Ice Crown. You can can encase yourself in solid ice when you are hit by an attack. As a reaction when you are hit by an attack, you can give yourself a bonus of +3 to your AC until the start of your next turn. This bonus is also applied to the triggering attack, potentially turning the hit into a miss. Once you use this trait, you must finish a short or long rest before using it again.
Elf Weapon Training. You are proficient with rapiers, longswords, shortswords and quarterstaffs