Obsidian panpipes
Made from fifteen cylindrical obsidian pipes bound together by smooth gold bands, obsidian panpipes are capable of producing a sound that lures out five rats to the city location wherein it is played, though it is ineffective when played in the sewers. Each pipe is differently shaped, with some waving and others corkscrewing. A plate of black glass is attached to the backside of the assembly, and a different gemstone is inlayed on the front of each pipe.
These panpipes may be bought from Merentesh's Shop of Wonders in Delos.