Shadowfell Keep is the name now given to the abandoned Imperial garrison of Aecris Hold (named for its commanding officer, Sir Keegan’s, weapon of choice.) The garrison was originally established to guard the rift, located in natural caverns beneath the fort – the rift was originally discovered by a small group of explorer/adventurers striking out from Winterhaven towards the ruins of Bael Turath in the northeastern reaches of the Empire. After alerting Dragon forces to their find, they continued on their trek, and were not heard from again.
The Dragon acted quickly, and dispatched the top scholars and clergy from around the Empire to investigate the rift; after concluding that it was leaking a dark energy, then-High Archon Bowden Cane ordered the establishment of a Scale garrison to keep watch. He ordered a Scale officer who had been eyeing retirement – Sir Keegan – to take command of the garrison. Initially, the accomplished veteran was glad of the assignment; it allowed him to remain in the military while providing a stable home for his pregnant wife, far from the front lines of the Niridan border.
Unfortunately for Sir Keegan, the rift’s influence was more pernicious than any had believed, and after a night of terror, the keep was abandoned and the rift left unchecked.