Just finished watching the released episodes. On the topic of Hei or Li or whatever his name is. I think his power might be to deliver some kind of electric current or something. He seemed like he was attacking by attaching a wire to them and then they started convulsing. Also when he killed that Jean guy he simply put his foot in the water and in the next scene Jean was dead. As to the terms of his contract, the only thing I can see being a plausable condition was the flipping of the book. Anyways, this seems like a fairly interesting series and I'm going to stick with it to see how everything plays out.