Bell of Opening
A bell of opening is a silver bell. It is similar in nature to the Chime of Opening.
Liber Mysterium
The Netbook of Witches and WarlocksBy Timothy S. Brannan and The Netbook of Witches and Warlocks Team
When struck, it sends forth-magic vibrations that cause locks, lids, doors, valves, and portals to open. The device functions against normal bars, shackles, chains, bolts, and so on. The Chime of Opening also automatically dispels a hold portal spell or an arcane lock cast by a wizard of less than 10th level.
The bell must be pointed at the item or gate to be loosed or opened (which must be visible and known to the user). The chime is then struck, a clear tone rings forth, and in 1 round the target lock is unlocked, the shackle is loosed, the secret door is opened, or the lid of the chest is lifted. Each sounding only opens one form of locking. A silence spell negates the power of the device. A brand-new chime can be used a total of 50 times before it cracks and becomes useless.
Caster Level: 10th; Prerequisites: Craft Wondrous Item, knock; Market Price: 2,000gp; Weight: 1 lb.