Arcane
Arcanes (renamed Mercanes in 3e) are a mostly forgotten race from D&D. They look like 12-foot tall blue-skinned humanoids with vertically stretched heads and long, slender, four-jointed fingers (though one sourcebook got this mixed up and depicted them with six normal fingers on each hand). They travel throughout the planes, making a living selling magic items. They were created in Spelljammer so that you could always buy a new spelljamming helm from one of them if your ship got destroyed.
3e Lore
Mercanes appear in the Manual of the Planes and again in the Epic Level Handbook. They speak "Abyssal, Celestial, Draconic, Infernal, and at least two other languages", and their favored class is Wizard. Mercane clerics worship Boccob. They are the founders of the City of Union, a Demiplane that attracts a lot of epic level characters and is like a safer version of Sigil.
5e Lore
Mercanes have the ability to telepathically communicate with all other mercanes even over extremely long distances, so if you scam one mercane, all other mercanes will quickly learn not to do business with you.
Gallery
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Planescape
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3e
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Dragon #356
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Pathfinder
