In a dark cathedral, a mage harnesses the power of demons to enhance her spells.
In an alchemical laboratory, a diviner inscribes a scroll of destruction.
Meanwhile, a bard and beastmaster seek out the prismatic dragon and golden lion to keep these forces of darkness at bay.
Res Arcana Lux et Tenebrae adds 4 new places of power, 12 artefacts, 4 mages, 4 monuments, and 2 magic items to res arcana. It also extends the game to five players, adds scaling rules for fewer players, and introduces two new things: scrolls and demons.