An-Ur

An-Ur wanders the limitless expanse of the Deep Ethereal, feeding on the prima matera - or concentrated ethereal mist - that makes up the Ethereal Plane. An-Ur appears as a ghostly shape on the rare occasions during which it semi-materializes on the Prime Material Plane, but it ripples with myriad colors when seen on the Deep Ethereal. Some sages have pointed to An-Ur's many hues as 'proof' of its connection to the curtain of vaporous color, a shimmering wall of ethereal mist that serves as a doorway to specific areas on the Border Ethereal.

An-Ur speaks the Common tongue of both good and evil dragons. Furthermore, it possesses the innate ability to communicate with any creature native to the Ethereal Plane.

Society
An-Ur lives a solitary existence on the Ethereal Plane, navigating the Waveless Sea on its own implacable course. Some sages speculate that it floats through the plane and acts like an ecological regulator, feeding off of the energy that bleeds into the Ethereal from the Inner Planes and maintaining some form of equilibrium.

Since it sometimes discovers or coerces items and treasure from individuals unfortunate enough to raise its ire, An-Ur must have a lair hidden in the Deep Ethereal, but no one has discovered it.

An-Ur is the oldest of Tiamat's children. Legends say that it sprang into being from Tiamat's first breath. Despite existing for hundreds of centuries, An-Ur has steadfastly ignored the ongoing struggle between the courts of Tiamat and Bahamut.

Ecology
An-Ur feeds off the swirling ethereal particles that compose the Ethereal Plane, culling its food like a whale. Once every three hundred years or so, this creature's hunger flares, and it must consume vast amounts of prima matera. It is the time of An-Ur's Hungering that the creatures of the Ethereal Plane fears the most, as it scourse the Deep Ethereal, devouring entire demiplanes. Once it finds an appetizing demiplane, An-Ur causes it to break apart using an innate ability similar to the demiplane decay Priest spell.

Relationships
An-Ur is the son of Tiamat and the grandson of Io.