Blood Drain

Melee Weapon Attack: +4 to hit, reach 5 ft., one target. Hit: The treacle attaches to the target. While attached, the treacle can't attack, and at the start of each of the treacle's turns, the target loses 5 (2d4) hp due to blood loss. Each time the target loses hp in this way, it must succeed on a DC 14 Wisdom (Perception) check to notice the treacle is attached and harming it, otherwise it is unaware the hp loss is from the treacle. A creature that loses hp in this way while below half its hp maximum automatically succeeds on this check.