Room of Darts and Blades CR 11
Type mechanical; Perception DC 25; Disable Device DC 20
Trigger location; Duration 1d4 rounds; Reset automatic (1d6 rounds after trap stops)
This trap is triggered when a character reaches the center of the room, at which point razor-sharp pendulum blades swing down from the ceiling accompanied by a fusillade of darts from the walls, targeting every creature in the room for 1d4 rounds. The trap resets itself 1d6 rounds after it stops.
Effect darts (Atk +18 ranged, 1d4 darts per target for 1d4+1 damage each); pendulum blades (Atk +18 melee [1d12+1/×3]); multiple targets (all targets within room)