Spirit Ships (Vessels of Cross-Demesne Travel)

Unsurprisingly, it was Aeldvari who first figured out how to cross the invisible line between Ysireth and the spirit demesne. Equally unsurprisingly, it was dar'Aeldvari who helmed the consistent efforts to be able to physically step into the spirit lands.
Surprisingly, however, it was druids who survived long enough to return. They, whose magic relied upon anima and not arcana, were not dessicated by the flow of arcana around them. They were the first kinvari to return under their own power, and never again did any expedition set forth without half its members being druids. (The spirit demesne is made of arcana, and when a kinvar travels there, the arcana bound up in their body and soul leaks out in an unexpected reverse-osmosis. It is uncertain why this happens, but it leaves even the most accomplished sorcerers drained and helpless within a short period of time.)
Over the course of centuries, a complex magical shield was constructed to preserve the arcane homeostasis of mortal visitors to the undying lands. Duovaren artificers and master engineers were consulted to further reinforce and stabilize the shield, which eventually took the form of a small room-like enclosure that could hold a double handful of kinvari. In time, the shield became a permanent fixture, an unmoving vessel to transfer itself and its living contents from one demesne to the other and back again.

The Advent of Spirit Ships

The first of its kind was named Helíangíl, a "spirit ship." It had physical bones permanently installed in a singular location, panes of perfectly-cut crystal glass and rods of purest rare metals structured like the facets of a tall-cut diamond around a hollow where kinvari could stand. To get into that physical space required translocation--arcane teleportation--as the angles of and seals along the facets could not risk misalignment. A protective chamber was built around the spirit ship, shielding it from environmental influences and physical risks.
The structure was nothing without the dense, complicated arcana that had been painstakingly engineered throughout each physical reinforcement. Helíangíl was a shield and a power source, a beacon and a cloak, a springboard and a safety line. In the spirit demesne, kinvari could pass freely through its humming walls; inside the ship, their arcana was safe and would be replenished if they had been drained by the outside tides.
Helíangíl's destruction was inevitable; with such an ambitious project and such narrow margins for error, entropy took its toll and eventually rendered its skeleton too skewed to risk continued journeys.
To craft a spirit ship is deeply costly and requiring of considerable hands-on expertise both arcane and mathematical, but there are a handful of spirit ships in operation at any given time, scattered across Lumasca and zealously protected from outside influence to preserve their perfection. Each has a name as though they are kinvari, and each keep Helíangíl as their family name.

Looking Up Within The Spirit Ship

by Daniele Levis Pelusi via Unsplash

Stepping Into The Spirit Demesne

by Jonatan Pie (Unsplash)