You can see in dark or dim light up to 60 feet.

At the fifteenth level you gain the ability to become a Wyvern for one hour every long rest, and you gain all the traits and ability scores of a Wyvern. At level twenty when you become a Wyvern you gain all of its ability scores besides INT, instead you retain your normal INT score, and you retain your ability to cast spells. 

At level twelve the nails on your hands change to the claws of a Wyvern, you can use these claws to attack dealing 5d8 plus the characters strength modifier slashing damage with a five foot range.

At level ten your teeth change to Wyvern teeth and you are able to use them as weapon, with a melee attack range  dealing 2d6 + 4 piercing damage. When latched on to something you have the option to use a bonus action to shake your head while latched on to a target dealing 5d6 slashing damage.

You strike an enemy that is in range with your tail dealing 2d6 piercing damage plus 2d6 poison with a 12 con save, if the con save succeeds the target takes half poison damage and dose not become poisoned. at fifth level at level five your tail will deal 2d6 piercing damage plus 3d6 poison with a 12 constitution save, if the con save succeeds the target takes half poison damage and dose not become poisoned. At ninth level your tail will deal 2d6 piercing damage plus 4d6 poison with a 12 constitution save, if the con save succeeds the target takes half poison damage and dose not become poisoned. At thirteenth level your tail will deal 2d6 piercing damage plus 5d6 poison with a 12 constitution save, if the con save succeeds the target takes half poison damage and dose not become poisoned. At seventeenth level your tail will deal 2d6 piercing damage plus 6d6 poison with a 12 constitution save, if the con save succeeds the target takes half poison damage and dose not become poisoned. At level twenty your tail deals 2d6 piercing damage plus 7d6 poison with a 15 constitution save, if the con save succeeds the target takes half poison damage and dose not become poisoned.

assive Fleshy wings sprout clearly from the wyvernborn's back, allowing them to fly using the wings given to them by their wyvern ancestory. Flight speed is 40 feet.

Your Wyvern ancestry makes you slightly stronger (your STR score increases by 1)