Vampire Spawn

The vampire can climb difficult surfaces, including along ceilings, without needing to make an ability check.

The vampire has these weaknesses:
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Forbiddance
The vampire can't enter a residence without an invitation from an occupant.
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Running Water
The vampire takes 20 Acid damage if it ends its turn in running water.
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Stake to the Heart
The vampire is destroyed if a weapon that deals Piercing damage is driven into the vampire's heart while the vampire has the Incapacitated condition.
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Sunlight
The vampire takes 20 Radiant damage if it starts its turn in sunlight. While in sunlight, it has Disadvantage on attack rolls and ability checks.

The vampire makes two Claw attacks and uses Bite.

Melee Attack +6, reach 5 ft. 8 (2d4 + 3) Slashing damage. If the target is a Medium or smaller creature, it has the Grappled condition (escape DC 13) from one of two claws.

CON Save DC 14, one creature within 5 feet that is willing or that has the Grappled, Incapacitated, or Restrained condition.
Failure: 5 (1d4 + 3) Piercing damage plus 10 (3d6) Necrotic damage. The target's Hit Points maximum decreases by an amount equal to the Necrotic damage taken, and the vampire regains Hit Points equal to that amount.

The vampire takes the Dash or Disengage action.