False Appearance. While the piercer remains motionless on the ceiling, it is indistinguishable from a normal stalactite.
Spider Climb. The piercer can climb difficult surfaces, including upside down on ceilings, without needing to make an ability check.
Drop. Melee Weapon Attack: +3 to hit, one creature directly underneath the piercer. Hit:3 (1d6) piercing damage per 10 feet fallen, up to 21 (6d6). Miss: The piercer takes half the normal falling damage for the distance fallen.
Clinging to the ceilings of caverns and large subterranean passages, piercers blend in perfectly with natural rock, dropping in silence to impale unsuspecting foes on the ground below.