|It is damn sure the needles from this trap are doused in something nasty.|
The needle trap is a mechanical trap which fires poisoned needles when stepped upon by a player or monster. They can fire 3-11 times before running out of ammo, and inflict a mild amount of poison on anyone who steps on it.
Prior to 0.15, stepping on a needle trap would generate a single poisoned needle ammunition.
Earlier versions could hold non-poisoned needles.