Vampire Spawn

Regeneration. The vampire regains 10 hit points at the start of its turn if it has at least 1 hit point and hasnt taken radiant damage since its last turn.

Spider Climb. The vampire can climb even on difficult surfaces and upside down on ceilings.

Vampire Weaknesses. Vampires most common weaknesses are sunlight and running water. When the vampire ends its turn in contact with one of its weaknesses (such as being bathed in sunlight or running water), it takes 20 radiant damage. While in contact with its weakness, it can't use its Regeneration trait.

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

Grab. Melee Weapon Attack: +6 to hit, reach 5 ft., one target. Hit: 8 (1d8 + 4) bludgeoning damage. The target is grappled (escape DC 14).

Bite. Melee Weapon Attack: +6 to hit, reach 5 ft., one target that is grappled incapacitated restrained or willing. Hit: 9 (1d10 + 4) piercing damage plus 14 (4d6) necrotic damage. The targets hit point maximum is reduced by an amount equal to the necrotic damage dealt and the vampire regains this number of hit points. The reduction lasts until the target finishes a long rest. If the target is reduced to 0 hit points by this attack it dies.

Hissing Scuttle (1/Day). When the vampire takes radiant damage, it moves up to its Speed without provoking opportunity attacks.