Deadly Aim will simply ignore defense rather than reduce it on the target, same values. This means this particular bonus will only affect you.

Window to the Soul is... While a cool idea, the max for a Limit Break is 25, and there's no reason your character can break that limit, plus I have no idea where this move came from. There isn't sufficient evidence for it's existence so to speak, and it also seems to designed to kill you but also likely kill another character. While such a move is cool if played properly, the problem here before that is that there's no indication your character would've learned such a thing.

Shadow of the Mountain will initiate immediately once you escape the sights of your opponent, so maybe have a flashbang handy for such a time.

Otherwise this is a pretty interesting high utility type character. That said while all those tools and such don't feel like they'd be Spells, they're also not really techniques... So I guess I'll let you keep them in Spellbook.

So seems mostly fine. Show me again after some changes.