For Khyros, I would have to say a heavy inspiration is thematically Wuxia films and the like, and more realistically, Baji Quan (Or Eight Extremes Fist, which sounds WAY cooler), which I admit I am surprised to see was mentioned earlier in the thread as well! A style that utilizes sword, great spear, and saber, as well as close combat heavily involving elbow strikes of various angles and intent, body slams, and arrow-like thrusting punches. The source of the explosive power of the style comes from the legs as mentioned, since you strike the ground as you strike the opponent to increase force. This video is a rather good example. (The loud slapping noises are his foot hitting the ground like a whipcrack, obviously.)
[youtube]1QGGQA2WTBI[/youtube]
[youtube]1QGGQA2WTBI[/youtube]