47
Oh NO...
(hexbear.net)
After taking a turn in the secession game I decided to start up my own fort. Two and a half years in, I have seen a weremoose attack (two dead, infected militia commander is trapped in a walled-off section of the fort), and just now an Etten (a giant two-headed humanoid creature). The Etten died without too much disaster, but it has dropped a tablet which turns anyone who reads it into a necromancer.
I don't think they read the tablet itself, though. From what I've read it has to be in a book. In adventure mode, though, you can totally read the slab!
I'm not trying to find out.