Hi DAD,
I think following the rules too much hampers creativity quite heavy. Maybe the reason why the Divine One can cast spells is because the Black Ring members contain a trait called "hubris." "Hubris" or overconfidence is the weakness of many evil characters. Their inflated ego causes them to make bad decisions. Perhaps that is why some people will not feel sorry for them when they come to a grisly end. Anyway, the Black Ring members did not ward the area to prevent the Divine One from casting spells because they thought they could destroy him/her easily in a fight...They thought wrong..That's one possible explanation I came up with. Who knows what the real reason is...
Thanks, <img src="/ubbthreads/images/graemlins/up.gif" alt="" />