Vampire Assassin

Assassinate During its first turn, the vampire has advantage on attack rolls against any creature that hasn't taken a turn.  Any hit the assassin scores against a surprised creature is a critical hit.

Beguiling Gaze As a Bonus action, the vampire fixes its gaze on a creature it can see within 30 ft. If the target can see the vampire, the target must succeed on a DC 13 Wisdom saving throw or the vampire has advantage on attack rolls against the target. The effect lasts until the target takes damage or until the start of the vampire's next turn. A creature that can't successfully saves against the vampire's gaze is immune to it for 1 hour.

 Evasion If the vampire is subjected to an effect that allows a Dexterity saving throw to take only half damage, it instead take no damage on a successful save, and half damage if failed.

Preternatural Cunning The vampire can use a bonus action to Dash, Disengage, or Hide.

Regeneration The vampire regains 10 hit points at the start of its next turn if it has at least 1 hit point and isn't in sunlight or water. If the vampire takes radiant damage, this trait doesn't function at the start of the next turn.

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

Sneak Attack Once per turn, the vampire deals an extra 14 (4d6) damage when it hits with a weapon attack that it has advantage on, or if the target is within 5 ft of an ally that isn't incapacitated and the vampire doesn't have disadvantage.

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.

 Multiattack The vampire makes two shortsword attacks.

Shortsword Melee Weapon Attack: +7 to hit, reach 5 ft, one creature. Hit 7 (1d6 + 4) piercing damage plus 10 (3d6) necrotic damage.

Shortbow Ranged Weapon Attack: +7 to hit, range 80/320 ft, one target. Hit 7 (1d6 + 4) piercing damage, and the target must make a DC 15 Constitution saving throw, taking 24 (7d6) poison damage on a failed save, or half on a successful one.