Arcane adventures never released mutations though. Even so, every base magic had a similar amount of mutations, and a decent one at that.
Now we have a billion lightning and fire mutations and practically none for magics like sand, wood, crystal and the such.
Not to mention that, if you’re playing a magic class, a good part of your experience will be locked to a choice you made when you had no idea about mutations, unless you’re able to find an item that has proven time and time again almost impossible to find.
Every magic is supposed to have at least two lost mutations and, judging by how it seems, one ancient.