Traits
Demonic Toughness
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.
Closing Wounds
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.
Actions
Attack
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.