The Ars Magica fanzine Sub Rosa #18 has just been published. This issue focuses on magical and mundane beasts, and rather than just being a list of stat blocks it contains background, story threads, abilities, creation rules, and all sorts of extra content for story guides to use in Ars Magica sagas.
The issue also contains a short story, a detailed write-up on advancing a magus using the Intangible Assassin style, and an alternative way of generating Shape and Material bonuses. Issue 18 is 128 pages long, so very good value.
Of particular interest to me is the custom spells offered as part of the Advancing the Intangible Assassin article. I love new spells.
An excellent issue, well worth a read.