You'll take many roles. At times, you may be a grog, a stalwart guard of the covenant, well-paid for your labors with a life far more exciting than that of the common folk. At other times, you may be a companion, a respected friend of the covenant, using your professional skills for a share of the glory and the reward. You'll also take on the role of a magus, a wizard of legendary power, a leader of the covenant, a member of one of the Houses of Hermes. With each role you play, however, you have knowledge few others possess. You know of Ars Magica, the art of magic.