Of grotesque design, this seemingly organic dagger appears to be made from sharpened layers of purple-black chitin. Sinister weblike patterns cover its surface, and the blade occasionally twitches and jerks of its own accord.

This +1 dagger quickly cuts through webs (magical or otherwise) without getting stuck. As a move action, you can cut through a web entangling you or another creature. You can move through webs created by a web spell at half your normal speed (although the weapon doesn’t prevent you from being stuck in either of these webs in the first place). These are continuous effects and require no activation.
Once per day, you can activate a spider fang to create a freestanding 10-foot-by-10-foot vertical curtain of cobwebs. This curtain doesn’t block movement, but does provide concealment to creatures behind it. Anyone touching the curtain causes it to collapse, dealing 2d4 points of acid damage to that creature.

Prerequisites: Craft Magic Arms and Armor, Melf’s acid arrow, web.
Cost to Create: 2,500 gp (plus 302 gp for base item), 200 XP, 5 days.