The home of Master Lanyr and headquarters to his faction of wizards who freely practice the dark arts within the city of Drithkowl. The castle itself has long been home to the Imirun family line and its current patriarch, Master Lanyr, has been lord of the castle for many years and has no known heirs. House Imirun has long been an ally of the city and offered auxiliaries during times of war.
Castle Imirun is situated along the western wall of the city in an area of the city called The Upper Slopes among a number of other palaces and keeps. The grounds of Castle Imirun actually extend beyond the city wall and thus creates a bulge in the perimeter walls of the city. Back when when Castle Imirun was being built, the master of the house at the time ordered his masons to match the design and shape of Drithkowl’s walls as to not draw attention to his castle from would-be attackers.