My game is d20 Modern, but the two systems are very similar, so either is fine just to give me some templates to work from. I'm basically looking for anything that isn't me pulling stuff out of thin ...
What sort of issues would I run into if I wanted to co-opt some D&D 3.5 creatures into a D20 Modern setting? I'm looking mostly at devils, demons and some of the astral creatures. Will such ...