Dark Lands is a dark magical prison/labrynth created by a long dead Dark Mage. His secrets were kept alive by his followers and they sold enchanted artifacts to those with enough riches to purchase them. These artifacts contain the power to spellcast the target into the deadly prison where it’s victims worst nightmares are manifested into reality. Read more in the full version!
A cult's theology is binding on the god involved: it is possible for that god to believe (and see, just like Winston Smith in 1984) that other gods are mythical, or jumped-up demons, or failing older spirits, even while those gods actually exist and thrive and act in the cosmos, even while working against him.