Darkling Mirrors

Made of gleaming obsidian glass, that grant passage between them, these artefacts are found all around Yre. While their purpose was unknown for a long time eventually the party learned their purpose from the mysterious Wizard Scholar Leander. Requiring a user's blood to be smeared on its surface and a magic key, a ring, tuned to the wearer, to allow passage.

Inside the mirrors is an infinite space, grey lit with a stone bridge that connects the mirror you enter with the mirror of your desired destination, with other bridges seen in the distance. An arcane rift can usually be found half way along the bridge

Origin
Leander later presented further information revealing that they are a recent creation wrought by a queen who sought a rapid method of travel between her allies and rivals across the world. The queen sought help from a long forgotten God of Knowledge, who recognized that the queen offered him a way to return to relevance after years of worshiplessness and obscurity.

Some of the mirrors were installed by mutual agreement between the Queen's city-state and others, and other mirrors were installed in secret, or via the aid of well placed citizens who offered secret accesses and hidden methods of ingress and egress. Via this method the Queen and the God sought to infiltrate locations of power ir value and begin to work their slow-turning plans.

Known Locations
On the west wall in the Ooze pit beneath the barbican.

In the Cellar of the Patrician's House behind several boxes

In the basement level of the Tourim Arcana Tower in the Kingswood

In the Golem room of the Collisuem Stellarum in the Kingswood

The walls of the Skull of N'Zune's chamber

Rumoured Locations
The Great Throne Hall of Astaphon

The Catacomb Ossuary

The Floating Spire Observatory

Queen Tanith of Urr's visiting chambers