Option 1 (focus on powers):
Option 2 (focus on intrigue):
Sean Sunderland grew up thinking that his greatest gift was simply to become a guardian magi who could protect corporations from magical intrusion and the specters that roam the Otherworld. But when the demons try to capture him after his college graduation, Sean discovers that he is one of the last Thaumaturges--powerful magi who can work magic without the runes and amulets that are normally required. Sean's magic is virtually unlimited, bounded only by what he can comprehend in sufficient detail. The problem is, though Sean can already create 300 meter fireballs and slow time, he has very little control over his magic. His magic seems to make him invincible, but the reflexive nature of it also makes him dangerous to everyone around him.
Though he hides his abilities from his family and most of his coworkers, there are ancient creatures who are not willing to let him ignore his abilities. The Eldest Dragon wants Sean to unseat the lord of the demons, the demons demand that Sean join their ranks or die, and a ten thousand year old vampire needs Sean's help to save his descendants from an evil phantasm. Sean knows he will ultimately have to face the demons--but what he doesn't realize is just how terrible their power is, for they are Thaumaturges also, and much more practiced. They kill him and turn him into one of them. Somehow, even as a demon, Sean will have to master his powers well enough to protect himself and those he cares about from not only the other demons, but also the darkness within himself.
At age twenty-four, with a college degree under his belt and a good job as a guardian magi for a small company, Sean Sunderland feels like he has a pretty good handle on his life. What he never suspected was how much of his life was based on lies. The Otherworld in which he works is actually just one small part of an ancient world that few suspect exist, and a race of demons want Sean for their own because of magical powers he doesn't even know he has. Even Sean's parents seem to be hiding something--his connection to the Otherworld may be stronger than he knows.
It isn't until the demons try to capture Sean that he becomes aware that his world isn't what he thought. As Sean is pulled ever more into a struggle as old as humanity itself, it becomes increasingly clear that the life he had struggled for years to build is lost. Even his newfound powers aren't enough to resist the demons--it isn't long before they kill him and turn him into one of them. Despairing at his undeath and desperate to escape the demon civilization in which he is now held captive, Sean must hold fast to his human identity if he ever hopes to escape and save those who still matter most to him.
For those of you who wish to read these hooks, please let me know what you honestly think of them. It would also be useful to me to know which parts catch your eye, if anything does. And also the reverse: what seems prosaic or cliche? I might do a third hook sometime soon, if these don't seem strong enough. For those of you who wish to have nothing spoiled, I'd suggest staying out of the comments section for this particular post, too.