Ok I think I understand how the Base, Theme, Animation works on offensive powers and some defense powers like a defense base with rock or fire theme or a resistance base with rock or fire themes. What I am having a hard time wrapping my mind around is how a regen powerset would work in this environment. If regen is the base what would possible themes be? I have played a fire based regen, according to character background, in both COH and CO but to me that has always been more of an animation difference than a theme difference. Or am I looking at this wrong, is regen more of a theme than a base?