medium Humanoid (Any Lineage)
Armor Class 13
Hit Points 40
Speed walk +30, climb +10
Challenge 1
Saving Throws cha +2, con +4, dex +5, int +0, str +2, wis +1
Damage Resistances exhaustion
Senses darkvision 30 ft.
Languages any one language (usually Common)
Blood-Bound. If the thrall has not consumed 1 ounce of blood from a vampire within the past week, it is poisoned for 1 week, and it loses darkvision and its Limited Regeneration, Spider Climb, and Sunlight Sensitivity traits until it consumes 1 ounce of vampire blood.
Limited Regeneration. The thrall regains 2 HP at the start of its turn if it has at least 1 HP and isn't in sunlight. If the thrall takes radiant damage, this trait doesn't function at the start of the thrall's next turn.
Spider Climb. The thrall can climb difficult surfaces, including upside down on ceilings, without needing to make an ability check.
Sunlight Sensitivity. While in sunlight, the thrall has disadvantage on attack rolls, and its Perception is 8 when perceiving by sight.
Multiattack. The vampire thrall makes two Rapier attacks.
Rapier. _Melee Weapon Attack:_ +5 to hit, reach 5 ft., one target. _Hit:_ 7 (1d8+3) piercing damage.
Repay the Gift. When a friendly vampire the thrall can see within 5 feet of it is hit by an attack that would reduce the vampire to 0 HP, the thrall can give some of its life force to save the vampire. The thrall loses 10 (3d6) HP, and the vampire regains HP equal to that amount.
Source: Black Flag SRD · OGL/Open