Algin's "Castle" Home and Hort of the Northern Souls of Dragonland.
"Algins Wehr" was the last bastion against the undead of the Prince of the Night, also called "soul-eaters". Erected in long laborious labor and years of hardship the North Dragonlands of his allies for this defense. Many brave warriors and workers had to make their precious life around the work.
Protection for one's own country, people, family, children, for the woman the man loved. After 25 hard years, "Algins Wehr" stood a monument, built against the abyss of evil, with walls of dragon shield, a magical building material of the demons on touch changed to ashes. With floating palaces in which the best magicians of Dragonlands await the day of decision. With the "Warriors of Light" the intruders in the towers of this weir around with their hearts and soul, are the vessels for the souls of the venerable ancient dragon, founder of the dragon country and bearers of ancient knowledge.
... the soul stone ...
A crystal that through its structure is able to absorb and store vibrations of the imagination and the soul of creatures.
Practically he then contains an image of the soul of this being.
Terragen 4.1, Mandelbulber, Blender 2.78, Photoshop