PFSRD:Scabbard Of Honing
From D&D Wiki
|This material is published under the OGL|
Price 500 gp; Aura faint transmutation; CL 3rd; Weight 1 lb.
This leather scabbard resizes itself to fit any axe, sword, dagger, or similar item normally stored in a scabbard. Sheathing a nonmagical weapon in the scabbard for 1 minute hones its edge as if it had been sharpened with a whetstone (page 75).
Cost 250 gp