Nethermagic

Nethermagic is a form of arcane energy discovered by the Marasinians in 1070. Compared to conventional arcane power, nethermagic makes spells easier to cast and makes their resultant effects more powerful. However, using it is addictive and over time nethermagic will cause the sanity of its users to deteriorate. It also has a negative impact on the immediate environment in which it is used; cumulative use of nethermagic in the same area will damage or mutate plants and animals, and change the composition or compromise the integrity of inorganic material.