Hidden in the Depths Hidden in the Depths takes the heroes down into the subterranean world of Aventuria. This sourcebook harbours knowledge about places thought to be forgotten: The tombs of the mage moguls of the Tulamid lands, the buried cities of the Bosparans and the abandoned Bingen of the dwarves. But there are more than just secrets lurking beneath the surface. Horrible creatures, who only have the death of the heroes in mind, are up to mischief there. There are rumours of mushroom caverns with spore warriors and glowing giant mushrooms, of rat-like inhabitants who cannot stand the light of the sun and of sinister complexes built by extinct creatures with three eyes. Are your heroes brave enough to uncover the secrets of the subterranean world of Aventuria, even if it might cost them their lives? This sourcebook provides you with an overview of the most important locations, regions and creatures deep underground. It also contains the game values of numerous monsters and culture-creating creatures as well as descriptions of quest-giving masters and characters that adventurers may encounter in the darkness.