what is the role of the denizens? also, what were the role of the horrorterrors?

Denizens are kinda like sages, they assign quests to their players and give them information. However since they are usually quite monstrous a lot of people just end up fighting them.

Horrorterrors are the dark equivalent of Skaia, and in a similar manner they are meant to influence and persuade the direction all things take