I've only read up until Changes but I'm running a Dresden RPG and one of my players decided to be a psychomancer and it is a nasty magic! If a warlock doesn't care about breaking the laws of magic, they can get real powerful, real quick, and it's real hard to stop them. Once this players character hit a significant milestone and became a full wizard, I've had a hard time creating opponents to knock him off his feet. What keeps these warlocks from dominating everything do you think? What are their limitations/drawbacks if morality isn't an issue?