Skyship Weatherlight

The Skyship Weatherlight was a magnificent prototype airship constructed by an anonymous group of wizards and artificers. The Weatherlight possessed an experimental technology fueled by high strains of arcane energy, a device known as the Planardrive; it granted the Weatherlight the ability to magically transport it and its crew to a different plane of existence. Various tests of the Planardrive and the Skyship Weatherlight proved to be successful, and it was used widely by the ones that had constructed it. The ownership of the Skyship Weatherlight became vague, and as the years passed, many of the descendants of the creators fought over the rights to own it, until the Weatherlight was stolen by a renegade group of apprentice wizards. The Skyship Weatherlight’s power was abused, and eventually it ran out of power, coming to a permanent halt within the Nether Mountains, secluded from all kinds of civilization. The apprentice wizards fled from the Weatherlight and never disclosed its location, fearful that they may be apprehended for stealing such an artifact. Decades passed, and the Skyship Weatherlight was uncovered by a group of adventurers who immediately took it under their ownership. These adventurers did research on the Weatherlight, and eventually found it ran off of a rare crystal which was formed by high concentrations of arcane energy, compacted into a physical, crystalline form. Having had some of this fuel on hand from previous expeditions, the adventurers used it to refuel the Weatherlight, and were amazed to be able to wield such a powerful vehicle. They decided to keep the true nature of the Weatherlight a secret, and it was passed off as any other ordinary airship, something that wasn’t a common sight in the Sword Coast, let alone most of Faerûn.

As the years went on, the Weatherlight's true owner became unclear, and it became so obscure that it was thought to be a myth, as with most of the airships fit with the Planardrive device.

Planardrive Technology
The Skyship Weatherlight was not the first airship to be fit with a Planardrive; in fact, it was far from the first. Experimental airships were designed with early Planardrive models in mind, and while some proved to be catastrophic and ineffective, others were true works of art, the pinnacle of craftsmanship to ever be obtained by a mortal race. One perfect example of an early, effective Planardrive-fitted airship is the Skyship Sovereign, a vessel built by a long forgotten race of the Astral Plane. The Skyship Sovereign eventually found its way into the hands of a sophisticated government, and it soon became their sanctuary, acting as a mobile capital city.

It is unknown whether the Sovereign still flies in the present, or if it suffered from a malfunction that caused it to jump into the direct path of a solid object, causing a crash, or if it made a planar jump and stuck itself in the fabric between the planes for all of eternity, almost ceasing to exist.