In fact, as soon as Marvin arrived at Rocky Mountain, he used the book of Nalu to call for the chess piece that he had left in the Underdark.
The Dark Elf, Raven.
After they fought off the Black Dragons' attack on Rocky Mountain, Marvin had given Raven an order.
She had to do her best to establish a force in the Underdark, a force that didn't follow any Gods.
Because of the Book of Nalu, if Raven sought shelter from the Black Dragon God or the Queen of Spiders, they might notice that she was being controlled.
Thus, Marvin had repeatedly warned Raven that she should establish a force that consisted only of non-believers.
Fortunately, the Gods had yet to descend. Although the Underdark had a very vile environment that made life difficult, at least a third of the lifeforms there believed in a God. Most of them believed in the Black Dragon God and the Queen of Spiders. However, the beliefs of these lifeforms were as fickle as their natures.
