A blade drawn from this diamond-studded scabbard is granted an incomparable magical edge.
Wondrous Item 625,000 gp
This scabbard resizes to fit any light blade or heavy blade. You can draw a weapon from this scabbard as part of the same action used to make an attack with that weapon.
Power Encounter (Free Action)
Use this power when you attack with the weapon most recently sheathed in the scabbard. Gain a +5 power bonus to the next damage roll you make with that weapon before the end of your next turn.
The weapon must have been sheathed in the scabbard for the full duration of your last extended rest. to gain this power.
Published in Adventurer's Vault, page(s) 170.