pf2e.fyi
From Pathfinder #149: Against the Scarlet Triad, which isn't enabled.

Acidic Needle Launcher

COMPLEX HAZARD 16
Stealth +28 (master)
Description A ceiling-mounted launcher rains resinous needles onto intruders, after which the needles melt into acid.

Disable DC 36 Thievery to disable some firing mechanisms, making three adjacent squares in the trapped area safe to enter.

AC 39; Fort +30, Ref +22
Hardness 26, HP 104 (BT 52); Immunities critical hits, precision

Needle Rain (attack)
Trigger A creature moves into the area indicated on the map

Effect The trap shoots an acidic needle at a random target in the area indicated on the map, then rolls initiative.
Melee Acidic Needle +35, Damage 8d6 acid plus 2d6 piercing
Routine (3 actions) The acidic needle launcher fires a needle at a random target in the area indicated on the map.
Pathfinder #149: Against the Scarlet TriadOGL