As the group nervously waits for whatever is coming, mechanical sounds come from above. Four stonelike cylinders extend from the ceiling and start dispensing a large number of mechanical whirring contraptions. Each is a tiny whirling mess of blades with a glowing red eye in the center. They descend and start swirling in a little tornado of razor sharp sound and fury.
Manhack swarm
N Tiny Construct (swarm)
Init +6, Senses Darkvision 60ft, lowlight vision, Perception +16
AC 20, touch 20, flat footed 18 (+2 dex, +6 insight, +2 size)
HP 117 (9d10+27)
Fort +8, Ref +10, Will +4
Defensive Abilities Swarm Traits
@LucianV Readied actions can be taken prior to the swarm attack.
Gil, Mary and Kelly take 2d6 damage and must make DC 16 Fort save vs. Distraction and DC 16 Fort Save vs. Poison