Vampire Servitor

Explode. When the vampirate is reduced to 0 hit points, it explodes in a cloud of ash. Any creature within 5 feet of it must succeed on a DC 14 Constitution saving throw or take 5 (1d10) necrotic damage.

Regeneration. The vampire regains 5 hit points at the start of its turn if it has at least 1 hit point and isn’t in sunlight or running water. If the vampire takes radiant damage or damage from holy water, this trait doesn’t function at the start of the vampire’s next turn.

Unusual Nature. The vampirate doesn’t require air or drink.

Vampire Weaknesses. The vampire has the following flaws:

Forbiddance. The vampire can’t enter a residence without an invitation from one of the occupants.

Harmed by Running Water. The vampire takes 20 acid damage if it ends its turn in running water.

Stake to the Heart. If a piercing weapon made of wood is driven into the vampire’s heart while the vampire is incapacitated in its resting place, the vampire is paralyzed until the stake is removed.

Sunlight Hypersensitivity. The vampire takes 20 radiant damage when it starts its turn in sunlight. While in sunlight, it has disadvantage on attack rolls and ability checks.

Shapechanger. If the vampire servitor isn’t in sunlight or running water, it can use its action to polymorph into a cloud of mist or back into its true form.

While in mist form, the vampire can’t take any actions, speak, or manipulate objects. It is weightless, has a flying speed of 20 feet, can hover, and can enter a hostile creature’s space and stop there. In addition, if air can pass through a space, the mist can do so without squeezing, and it can’t pass through water. It has advantage on Strength, Dexterity, and Constitution saving throws, and it is immune to all nonmagical damage, except the damage it takes from sunlight.

Unarmed Strike. Melee Weapon Attack: +3 to hit, reach 5 ft., one creature. Hit: 5 (1d8 + 1) bludgeoning damage. Instead of dealing damage, the vampire can grapple the target (escape DC 14).

Misty Escape. When it drops to 0 hit points outside its resting place, the vampire transforms into a cloud of mist (as in the Shapechanger trait) instead of falling unconscious, provided that it isn’t in sunlight or running water. If it can’t transform, it is destroyed.

While it has 0 hit points in mist form, it can’t revert to its vampire form, and it must reach its resting place within 2 hours or be destroyed. Once in its resting place, it reverts to its vampire form. It is then paralyzed until it regains at least 1 hit point. After spending a long rest in its resting place with 0 hit points, it regains 1 hit point.

Bite. (when in a grapple only). Melee Weapon Attack: +4 to hit, reach 5 ft., one willing creature, or a creature that is grappled by the vampire, incapacitated, or restrained. Hit: 3 (1d4) piercing damage plus 4 (1d6) necrotic damage. The target’s hit point maximum is reduced by an amount equal to the necrotic damage taken, and the vampire regains hit points equal to that amount. The reduction lasts until the target finishes a long rest.