They can corrupt each other's magic paths, trying to use evil for good and vice versa... who says the DK can not turn a nice guy, or the opposite? <img src="/ubbthreads/images/graemlins/silly.gif" alt="" />
The fact that the main character is a servant of the Divine implies he/she/it is good-aligned? I want to be evil and embarrass my DK with my superior (Elemental, dear Watson) Evil skills <img src="/ubbthreads/images/graemlins/badsmile2.gif" alt="" />
