SRD:Pipes of Haunting
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Pipes of Haunting: This magic item appears to be a small set of pan pipes. When played by a person who succeeds on a DC 15 Perform (wind instruments) check, the pipes create an eerie, spellbinding tune. Those within 30 feet who hear the tune must succeed on a DC 13 Will save or become frightened for 4 rounds. Creatures with 6 or more Hit Dice are unaffected. Pipes of haunting can be sounded twice a day.