Doorbreaker
Also known in Varisia as a “Desnan Key”, this device resembles two ornate starknives joined at the core. The blades of a Doorbreaker are constructed of adamantine and freely rotate in alternate directions. Up to three times per day, the Doorbreaker can be placed on a solid surface (such as a door, window or floor) and commanded to animate.
The device deals 2d4 points of damage per round to objects, ignoring hardness, and continues to cut for a number of rounds equal to the CL, until commanded to stop, or the target object is destroyed. If allowed to move, the Doorbreaker will progress at 5’/round.
The apparatus is ensorcelled to operate silently, and automatically attempts a targeted dispel magic on any spell effect that has been placed on the target object, including arcane lock, fire trap, symbols and glyphs.
With a second command word, the Doorbreaker can also seamlessly repair the damage it has inflicted at the same rate.
Greater versions of the Doorbreaker exist, with an increased caster level
Moderate abjuration and transmutation; CL 5th, 10th or 20th; Craft Wondrous Item, animate objects, mending, dispel magic/greater dispel magic, silence; Price 9,000 gp, 18,000 gp, or 40,000 gp