Vampire Moth

Mandibles. Melee Weapon Attack: +5 to hit, reach 5 ft., 1 target. Hit: 10 (2d6 + 3) piercing damage, and the moth attaches to the target. While attached, the moth can’t make Mandible attacks. The moth can detach itself by spending 5 feet of its movement. As an action, a creature within reach of the moth can try to detach the moth, doing so with a successful DC 13 Strength check.

Blood Drain. The moth deals 10 (2d6 + 3) necrotic damage to one creature it is physically attached to, provided that creature isn’t a Construct or an Undead. The moth then regainst hit points equal to the damage dealt.