The Voidgate is the portal that connects Oberin to the Void Realm. It was constructed by A.R.D.E.N.T. in the year 443, just to the north of Foehan. To use the Voidgate, one need only to drop a Small Moon Fragment inside the portal. The Voidgate also doubles as a temple, at least on the Oberin side. On the other side, there is a vast, dark, and cold region with many ruined structures scattered throughout.
A.R.D.E.N.T. first became interested in establishing such a portal after their leader, Edgard, got stuck inside the Void Realm in 441. And not long afterwards, Senator Morgans of Andris also became trapped inside. In the Fighting Moon of that year, Edgard managed to send one final message to Oberin, in the form of a massive stone spear.
A.R.D.E.N.T. used the information encoded in that spear to begin researching on how to construct a portal. They learned that it would need to be in the form of a temple, and so they spent much of the next year researching temple construction. They scoured the libraries of Brigobaen, and even kidnapped the blacksmith of Mirith in an attempt to gain information from a local historian.
The construction project finally got off the ground in the Blue Moon of 442. A.R.D.E.N.T. had learned that temples were made from fragments of the moon, and they theorized that portals would work similarly. Some strange sights were reported at the construction site during this time – it appeared that the group was somehow making use of Stone Golems for the project.
In any case, by the time the Blue Moon came around again in 443, the Voidgate had been completed. Two agents of A.R.D.E.N.T. named Ezranth and Fefe used it briefly to establish a link to the Void, but it was deemed too unstable and promptly deactivated. Eventually, it was reactivated again, and in the year 446, a group of adventurers hunting nearby were sucked inside. This group was able to explore the other side, but they found no traces of Edgard or Morgans.
The Voidgate has not been used since, but it is still presumed to be functional.