I am playtester and author of the pen and paper roleplaying game line Ars Magica by Atlas Games. An Ars Magica game is set in Mythic Europe: a medieval Europe of the year 1220, but with a fantastic twist: the stories and legends are true. Magical animals roam the land, mischievous faeries interact with humans, the devil and demons constantly fight with the heavenly forces over human souls. The player takes the role of an Hermetic Magus, a sorcerer capable to great magics, but bound by rules and covenants of the wizard society he is part of.

I have authored a chapter of the Magi of Hermes book, and playtested practically every book since Houses of Hermes: Mystery Cults.