No, Litrix is resistant to elemental damage, not spells in general. I don't think spell penetration is a function or decision of the caster, but "thhe owner" of SR who can spend standard action to lower itI have a question about @MetaVoid’s post: he’s resistant to magic so I take that to mean he has SR? Phar has Greater Spell Penetration. Can you suppress SP?
Like, if I don’t try to overcome spell resistance, would spells just automatically not work on him?
Or is there some kind of minimum dice that I have to roll?
Edit: maybe he just means he has damage reduction and high saves?