The major effect is on wizards. The game material is pretty clear on that preservers and defilers are separate classes. There are some rules for a preserver later becoming a defiler in Defilers & Preservers, but basically the two are separate.Sammael99 said:Could you explain ? I read only the first four or five DS supplements and the revised campaign setting, so I don't actually understand what you mean and how it impacts the conversion...
One of the plot points in the novels is that Sadira, the half-elven wizard hero, has a rather cavalier attitude to the whole preserving/defiling thing. She'd rather use preserving magic, but if she feels threatened enough she won't hesitate to defile (and does so a number of times in the novels). In order to accomodate this, the conversion people decided to make "wizard" a single class, with various feats and skills influencing the preserver/defiler thing.
Looking at the athas.org site, I also see that they have changed the Templar pretty heavily, making it a prestige class and totally changing the way they cast spells. Bah.