Arcanium is a natural substance, found deep below the earth. It facilitates the casting of magic, for reasons unknown. It not only helps mages go beyond their normal magical capacity, but can enhance the effects of any spell cast near it It is often ground up and used in potions to enhance the potions properties. The downside is it’s rarity. There is no telling when or where it will show up, and arcanium has been know to be found in areas that had already been searched for it. In fact, many people believe that it doesn’t originate on this plane, but rather in the heart of the astral sea.
LAtely, veins of corrupted arcanium are being found all over Severil. Usually strange warped createures and plants are found in the vicinity of these veins. Most mages believe that the corruption is slowly spreading through the arcanium left in the world, causing the world to twist itself apart