Battlehorn Castle Battlehorn Castle is located west of Chorrol near the end of the Black Road as it heads towards Hammerfell . It becomes a home for the Hero when the quest " Battlehorn Castle " has been completed . This large magnificent castle comes with the official plug - in Fighter ' s Stronghold . Battlehorn Castle Courtyard . Just inside the entrance of the castle is the Castle courtyard , which features stables to the east , and a smithy with the blacksmith ' s house to the west . The stone walls are accessible via two sets of staircases opposite each other . The four towers on the corners of the courtyard are accessible , as are the gatehouse towers . Each of the towers has storage space inside . The west portion of flat roof is accessible via the Secret Vault in the private bedroom area next to the library . Just outside the gates , Southeast along the road , is a pond with a boat dock and a wooden boat . To the left of the dock is a Nirnroot and underwater beneath the boat is a treasure chest and a cluster of clams . Another cluster of clams can be found behind a rock further along in the pond . Battlehorn Castle Great Hall . The Main entrance takes the Hero to the Great Hall Foyer . To the left is an entrance to the Northwest tower and the basement . The Knights of the True Horn ' s barracks and another basement entrance is to the left past the stairs , to the right before the stairs at the wall is their very own mini - altar ( Altar of Julianos ) - if they visit the relevant wayshrine this will be activated , past the stairs is an entrance to the East Wing , and straight through is the Trophy Room . Up the stairs is another entrance to the east wing on the right , and an entrance to the Private Quarters on the left . A nirnroot grows on the Wolf ' s pedestal , hidden at the back behind the rock . On the second level , there is the " King " skill book on a table . Battlehorn Castle East Wing . The east wing contains the Dining Room in the north section , and the Taxidermist ' s office in the south section . Battlehorn Castle Private Quarters . The Private Quarters houses the bedroom , library , private dining area , office , and secret vault area . The bedroom contains a bed , a few drawers , tables , closet , and bookshelf . There are two skill books in the library on the shelf , " History of the Fighters Guild " and " Heavy Armor Repair " . There are two more skill books on one of the dressers near the bed , " 2920 , vol 01 - Morning Star " and " Warrior " . The entrance to the secret room is on the south of the library nook , just pull the switch on the side of the depression in the wall , inside is storage containers , a trap door to the roof , and Lord Jaren ' s Journal . Once all the of upgrades are purchased ( including the Dwemer Forge ) , Lord Kelvyn ' s Bulwark will spawn in a chest at the end of the bed . Battlehorn Castle Basement . The basement has three entrances , two from the Great Hall and one from the East Wing . The Training Room , Kitchen , and Wine Cellar are all located on this level , along with a couple of small bedrooms and a hidden entrance to the Battlehorn Castle Grotto behind the archery range , one can access it by activating a candelabre . There is also a secret passage from the basement to the great hall through the wine cellar . Battlehorn Castle Grotto . The Grotto , accessed from the training room in the basement , is the lowest level of the Castle . To find it , go to the room with the dummy used for archery . Go behind the dummy to the right side and activate the unlit candelabra . Inside are two hostile undead , Lord Kain and Arielle Jurard - a skeleton and lich , respectively . For more details on the two , see Battlehorn Castle ( Quest ) and Lord Jaren ' s Journal . After defeating Arielle , loot a key from her corpse that unlocks a chest in the South - west side of the room submerged in water along the wall . One can also get a unique enchanted sword from Kain along with an enchanted shield . If the Hero cast a spell while close enough to the giant crystal in the center of the room , it will glow more brightly for a brief time . If they cast a high level lightning spell like electrocution at it the effect lasts for a while and is quite striking . There is yet to discover if this has any other benefits than looking nice . There are three Varla Stone s in the grotto too .