Vampire Spawn Assassin

Regeneration. The vampire regains 10 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.

Spider Climb. The vampire can climb difficult surfaces, including upside down on ceilings, without needing to make an ability check.

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 when it ends its turn in running water.

Stake to the Heart. The vampire is destroyed if a piercing weapon made of wood is driven into its heart while it is incapacitated in its resting place.

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.

Sneak Attack (1/turn). The vampire spawn deals an extra 14 (4d6) damage when it hits a target with a weapon attack and has advantage on the attack roll, or when the target is within 5 feet of an ally of the vampire spawn that isn’t incapacitated and the vampire spawn doesn’t have disadvantage on the attack roll. If the target has blood and is not a construct or undead, the vampire spawn gains 1/4 of the damage as temporary hit points.

Bloodletter. On a successful Sneak Attack, the target suffers a lingering wound that causes it to take 7 (2d6) necrotic damage at the start of each of its turns, and takes one level of exhaustion. Each time the vampire spawn hits the wounded target with a subsequent Sneak Attack, the damage dealt by the wound increases by 3 (1d6). The wound ends if the target regains hit points or if a creature uses an action to stanch the wound, which requires a successful DC 15 Wisdom (Medicine) check. Once the wound is healed, the target loses the level of exhaustion gained through this effect.

Evasion. If the vampire spawn is subjected to an effect that allows it to make a Dexterity saving throw to take only half damage, the vampire spawn instead takes no damage if it succeeds on the saving throw, and only half damage if it fails.

Multiattack. The vampire makes two attacks, only one of which can be a bite attack.

Claws. Melee Weapon Attack: +6 to hit, reach 5 ft., one creature. Hit: 8 (2d4 + 3) slashing damage. Instead of dealing damage, the vampire can grapple the target (escape DC 13).

Bite. Melee Weapon Attack: +6 to hit, reach 5 ft., one willing creature, or a creature that is grappled by the vampire, incapacitated, or restrained. Hit: 6 (1d6 + 3) piercing damage plus 7 (2d6) 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. The target dies if this effect reduces its hit point maximum to 0.

Uncanny Dodge. The vampire spawn halves the damage that it takes from an attack that hits it. The vampire spawn must be able to see the attacker.