Spontaneous turning into soulless husk?
Not sure this is a bug
I entered a dungeon, and found myself in a room with a few enemies. As I entered I saw the following message: "The giant frog is turned into a soulless husk due to mana loss!" There was no frog, so I guess this means it died, spontaneously. Or some other bug happened. Or this is entirely intentional and just some funny coincidence.