| Tony Bradley 977 |
While I appreciate the warning of SKR, I think this can be handled as long as it is done so gently. I know I have had PC request similar items and given the flavor of item the OP has in mind I think it can be done without breaking the game or being ridiculously expensive.
Scabbard of True Strike
When weapon is in Scabbard you may activate as a standard action. On the first attack made in the next round of combat wielder will receive a +20 bonus to hit or combat maneuver using that weapon. Scabbard may be used up to 3 times per day.
This keeps the action economy restrictions of the true strike spell in balance.
I priced it somewhat unconventionally. I decided that I would say this item has a per charge material component that is equal to a single use, use activated item (eg. potion). I also determined that touch range version of true strike would bump it to level 2 spell range. so each material charge would cost 300gp (3*2*50). Then multiply by 50 charges for items with limited uses per day. 15,000gp Double for slotless item 30,000gp. and then divide by (5/3) for 3 charges per day.
Final Cost 18,000gp
This is far from ordinary pricing structure but this item (and spell) are unruly when it comes to the tradition pricing structure. In the end I don't think the power of the item is out of line with the cost and to RD's point it isn't so cheap that PC's and going to run out and buy 10 of them.