Arcane Law presents the magic system for Dark Fantasy . It includes rules for the generation, and advancement of, Mage characters, spells, powers and wild magic.
From the Introduction:
The world of Dark Fantasy appears much like our own though it is touched by fantasy. It is woven with the stuff of legends and dreams. The subtle forces that shape the nature of our reality are more overt in Dark Fantasy and they support the existence of Magic. There are no cells, atoms or electrons and physics and chemistry do not directly apply except in a superficial way.