When I think of the nature of Dark Souls I imagine an intertwined secret sub-community and death... death complemented by player anger. In Dark Souls when you die repeatedly you're filled with anger. I imagined a creature that would manifest solely off the anger of player-death to become increasingly stronger the more souls it collected. The nature of the creature would feed on the secret sub-community's unfortunate deaths, to create more misfortune and death. Woooooo... morbid.
As far as the literal sense of making it goes, it's just hand drawn with pencil on paper.
LOOK WHO CAME: