Sketto

Vicious, medium-sized, hematophagous flying reptomammals, skettos dwelled in the caverns of Tatooine. Only emerging when light conditions were at their lowest, these four-winged beasts possessed excellent twilight vision to assist in the consumption of airborne insects. Skettos fell into the reptomammal class, being warm-blooded and giving live birth to a single offspring at a time.The most horrifying part of a sketto's life was its tendency to swarm with others of its kind to suck the blood of large, sleeping mammals. Their large, frightening teeth helped to puncture the toughest of hides, and legend had it that a sketto swarm could suck a sleeping dewback dry overnight. Despite being a reptomammal, they bled green blood.

Armor Class 13 · Hit Points 3 (1d6) · Speed 10 ft., fly 40 ft.

Blood Drain (Action). The sketto can detach itself by spending 5 feet of its movement. It does so after it drains 10 hit points of blood from the target or the target dies. A creature, including the target, can use its action to detach the sketto. Melee Weapon Attack: +5 to hit, reach 5 ft., one creature. Hit: 5 (1d4 + 3) kinetic damage, and the sketto attaches to the target. While attached, the sketto doesn't attack. Instead, at the start of each of the sketto's turns, the target loses 5 (1d4 + 3) hit points due to blood loss. Droids and constructs are immune to this effect.