Advantage on Stealth checks, invisibility as if under the spell Invisibility 1/short rest. This form of invisibility can only be seen by truesight.

Resistance to fire (does stack).

+3 AC, +3 to attack and damage rolls with unarmed strikes.

Darkvision out to 120 feet. If your darkvision is already 120 feet, you gain blindsight up to 30 feet.

The range for your unarmed strikes increases to 15 feet. If you hit one creature with both of your attacks, you can force them to make a Constitution saving throw (DC = 8 + proficiency bonus + Wisdom modifier). On a failure, the creature's speed is halved, it has disadvantage on Dexterity saving throws, and it can't use reactions for 1 minute. Moreover, on each of its turns, it can take either an action or a bonus action, but not both. At the end of each of its turns, it can repeat the saving throw, ending the effect on itself on a success.

Notes: Resistance: Fire, Bonus: Unarmed Attacks, Damage: Unarmed Attacks, Advantage: Stealth, Blood Hunter