Not much is know about the mysterious entities known as Nehushtan and Grumium. Some say that Nehushtan writhes in some remote bog somewhere in the northern forests of the Taiga, only surfacing at the turn of the new moon. Grumium is said to be agonizing in some unknown cave system hidden deep in the mountains, never slithering far from his dark and tormented abode. Then again, some say that the wretched duo are not even flesh and blood at all, but two miserable spirits that loom from beyond the veils of mist and moonlight.

Source : Storm on the Abyss writing