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 D20
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This article is a D20 reference page
The System Reference Document is a comprehensive toolbox consisting of rules, races, classes, feats, skills, various systems, spells, magic items, and monsters compatible with the d20 System version of Dungeons & Dragons and various other roleplaying games from Wizards of the Coast.
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Chime of Interruption: This instrument can be struck once every 10 minutes, and its resonant tone lasts for 3 full minutes.
While the chime is resonating, no spell requiring a verbal component can be cast within a 30-foot radius of it unless the caster can make a Concentration check (DC 15 + the spell’s level).
Moderate evocation; CL 7th; Craft Wondrous Item, shout; Price 16,800 gp;Weight 1 lb.
System Reference Document -> Magic Items: Wondrous Items