Sildëyuir

More than two thousand years ago, the depths of the Yuirwood held the realm of Yuireshanyaar, home to the reclusive star, or mithral, elves. Faced with aggressive human settlers along the Wizards’ Reach (most from Old Unther) carving out lands of their own from the ancient forest, the star elves decided to withdraw from Faerûn. Their High Mages forged a forest-wide network of stone circles and then worked a mighty spell through the standing stones that created a demiplane for the star elves to call their own. Most departed Faerûn at that time.

Sildëyuir is a plane of eldritch beauty, a land of perpetual twilight illuminated by a host of glittering stars. It extends about as far as the forest’s borders, and like the Yuirwood, is an unbroken expanse of deep green dells and hidden brooks. The star elves raised great glass citadels for themselves and live there still, masters of song magic and lords of this fey realm.

• Light gravity.
• Flowing Time: Two days on the Material Plane equal one day in Sildëyuir.
• Finite Size: Sildëyuir is coterminous with the Yuirwood.
• Alterable Morphic. Objects remain constant unless affected by physical force or magic.
• No elemental or energy traits.
• Strongly neutral-aligned: Intelligence, Wisdom, and Charisma-based checks take a –2 penalty for nonneutral creatures; –4 for beings with two nonneutral components in their alignment.
• Enhanced Magic: Spells with the sonic descriptor are empowered and heightened by two levels in Sildëyuir.

The ancient menhir circles of the Yuirwood hold portals leading to Sildëyuir, although most are keyed to function only for star elves. The Ethereal and Shadow Planes are not coterminous with the demiplane, so spells using ethereal or shadow effects do not work there, but the Astral Plane is accessible.

Sildëyuir has been under assault by a race of alien sorcerers of great power for several centuries now. The nilshais, natives of some distant, horrible reality, stumbled across the existence of the demiplane long ago, and they seek to invade Sildëyuir and subvert it to their own twisted purposes. Each incursion is more difficult to fend off, and large portions of the realm have been poisoned by the nilshais’ alien sorcery. From these corrupted regions horrid, unliving spawn emerge to haunt the silver woods and terrorize the citadels of the star elves. Some among the mithral elves counsel abandoning their extraplanar home and returning to the Yuirwood, while others argue for seeking help from their kinfolk in Aglarond’s forests.