Hey, so I looked over your campaign setting, it's very detailed, I like it a lot. It has a lot of interesting facets about the world. I like the differing magic mechanics. How exactly does divine magic work though, does it have to come through that one particular god to work properly? Also he/she is referred to as the Dark God, does that mean he's technically an evil deity? Just a few questions, I like the magi though, they were a good touch, it's always good to be able to give players something/someone to hate.
I did have some thoughts about the alterations one can make to spells by 'burning oneself' in order to fuel the spells. d8's can add up pretty fast considering that a dedicated spellcaster has a hp ceiling of about 120hp if he's lucky and even a hybrid is gonna be hurting with just minor alterations, d4 is too little damage though, d6's might be more reasonable unless it's intended directly to be a 'Oh Shit' button of sorts to be used in emergencies. Also I was wondering if you'd considered planar magic, in my setting chaos-type magic is heavily penalized because of an event in the worlds' past, however certain chaos mages have found a way of making pacts with the demonic spirits left over in the world to fuel their magic without worrying about the spell fizzling at the wrong time. So how do the planes work in you world? Just had me wondering was all. Anyways I like it, I'm looking forward to playing in it!