D20 Slaine - Magic Attack Bonus - How is this possible?

At first, looking through the Sesair tribe source book for Slaine D20. I notice that Cathbad has a Magic Attack Bonus and assume that his magical attack naturally, but then I notice that Gerg of the Three Fingers, Gundam the Alarming & Mongan Axehead have the Magic Attack Bonus themselves, despite them not being Witches or Druids?

Have I missed something important there or what?

Something about this may click and everything might fall into place after I submit this query, but I think it needs explaining....
Last edited:
BTW, what does SA stand for? All the major identities from each tribal book has that as some sort of stat and it has me just stumped as to it's meaning...