Blood Demon

If the demon takes any damage between its turns, it gains temporary hit points equal to your proficiency bonus at the start of its turn.

During a short rest the demon can heal for an extra amount equal to your Soul Binder level, it must finish a long rest before it can do so again.

Melee Weapon Attack: your proficiency bonus + its Strength modifier to hit, reach 5 ft., one target. Hit: 1d8 + its Strength modifier bludgeoning, piercing or slashing damage.