A bunch of darts come out of a wall if someone steps on the trigger, typically a floor tile.
Detect: Per-based Traps.
Disarm: DX-based Traps at -2.
Circumvent: Automatic (don't step on trigger).
Evade: Hearing roll allows Dodge. This is all-or-nothing; the target either gets all his Dodges or none.
Effects: Fires 1d-2 darts at each target in each of three adjacent hexes. Each dart does 1d-2 small piercing.
Rearm: If you can get to it, sure. These tend to be inside walls or statues, however, and you need more darts.
A nastier version of this fires 1d darts at each target in a 2-hex radius. Each dart does 1d-2 small piercing. It's harder to find (-2) and disarm (-5) and hear (-2) if triggered.