Hidesplitter
Aura Faint Enchantment and Transmutation; CL 5th
Slot none; Price 10,310 gp; Weight 8 lbs.
Description
This +1 Boar Spear's tarnished blade features a blood red sash fastened to its crossguard. Hidesplitter's steel blade is specially attuned to slaying woodland terrors and is considered both silver and cold iron.
Upon striking, the wielder may choose to embed Hidesplitter as a swift action, applying a -5 penalty to damage reduction or natural armor bonus to the target struck. This penalty can never reduce a creature's natural armor bonus or damage reduction below 0. This ability has no effect on creatures whose damage reduction is not overcome by Hidesplitter itself.
While Hidesplitter remains embedded, the target may not take a 5ft step and may only move with a successful drag maneuver against the wielder. Attempting this maneuver does not provoke attacks of opportunity, though any subsequent movement provokes as normal. Hidesplitter's wielder may release the weapon as an immediate action, avoiding this drag maneuver, though Hidesplitter remains embedded.
Creatures can remove Hidesplitter from themselves by succeeding a DC 10 strength check as a standard action that provokes attacks of opportunity. Hidesplitter's wielder may remove it without a strength check as an swift action that does not provoke attacks of opportunity.
While embedded, Hidesplitter can not be used to make attacks, but provides a +2 shield bonus to your AC against the effected creature, as if it had been used successfully against a readied charge.
Construction
Requirements Craft Magic Arms and Armor, hold person, versatile weapon; Cost 5310 gp
Hidesplitter
The Good: Great name, it is exactly on point with theme, and does NOT use the items base type or the word OF. Also nice detail with the sash. Lastly, you went very different than most weapons, and that was a great call, I love the concept of this spear.
The Bad: The wielder suffers mobility issues just like the target I would assume, that could get very nasty very fast. Also, bypassing DR rather than reducing it would have been fine as per the required spell.
The Ugly: To gain max benefit, the wielder can't continue to wield the spear actively unless their target is dead, and a reduction of 5 natural armor could render a decent CR creature far weaker than normal if natural armor was its main defence (many monsters work this way).