Sunken House (concept)
One of the Sirhad's most famous strongholds, the Sunken House was used to protect the group's most dangerous secrets and critical resources. It was considered completely impregnable, not just because of its ingenious wards and defenses, but because it was also secreted away deep in the desert. No surviving accounts exist giving even the barest hint of its location or appearance, for it is believed that the masters of the Sirhad had magically bound shades to the task of hunting down and devour any written works which accurately described the fortress.
The Sunken house also protected much of the Sirhad's records, and was critical to maintaining their strong cohesion. While only a select few would be given the keys to access it, through a series of now lost spells the keepers of this citadel were able to stay in constant communication with the rest of the Sirhad, no matter how distant they were.
The House was yet another casualty of the collapse of the Sirhad, though thanks to a carefully maintained quarantine it is believed to have remained untouched by the Bloodblight. Instead, in the three days before all contact was lost, members of the Sirhad record having received a series of increasingly panicked and disoriented communiques from their contacts within the citadel, warning them from attempting to enter and raving about a shadowy animalistic hunter referred to only as "the Beast".
Despite this somewhat ominous conclusion to its known history, finding and looting the Sunken House has been a perennial favorite of treasure hunters, adventurers, exiles and common bandits everywhere throughout Sarradon and beyond. Despite their best and bravest efforts, no one has lain eyes upon the citadel in over half a millennia - or at least, no one has done so and returned to tell the tale.