In the heart of Waterdeep’s Dock Ward, beneath the scent of brine and forge smoke, the Waterdeep Trading Company maintains its Alchemical Quarter—a labyrinth of retorts, cauldrons, and spell-bound distillation coils. Among the many products refined there, one holds legendary status across guilds, workshops, and airship docks alike: Grease of the Serpent.

This emerald-hued substance, smooth as silk and alive with subtle motion, resists rust, corrosion, and even arcane interference. It is the m...