From publisher blurb:
In Théah, mirrors have power, and a group of hidden magicians have learned to harness that power.
This complete new Montaigne sorcery offers the ability to change and manipulate reflections, steal secrets and even step into the realm beyond the glass. But there is a cost, and as each mirror shatters, a little piece of your soul goes with it.
In this supplement we detail all the powers of a Mirage Sorcerer or ‘Illusionniste’ and how the paranoia of L’Empereur has led to them being hunted and feared. We offer all you need to create Mirage sorcerers as player characters and include a few story hooks to bring them into your campaign.