About the Saint Exorcist and related medals.

Checked the Medal UI and saw it there, the stats for the first medal (whose name I do not recall, it may be Saint Exorcist or something similar. I used Saint Exorcist because it sounded similar, so I figured it was some kind of quest chain) are lackluster. What are the stats of the medals, and what do you have to do to get them all? Deciding whether or not it's worth it or if I should just keep questing for the Quest Specialist Medal.