Drall has a point Dag. It doesn't matter how fast your eyes can track if the neural signal can't make it to the brain in enough time for the brain to translate the signal into visual data before the sword hits. Unless you also altered his entire nervous system and brain structure, the eyes wouldn't help.

Grnmachine: I love that character. Being a fan of archery, I've considered making my own based on the ability several times. A couple things that stand out as potentially needing some clarification though are his arrow abilities. Specifically the fact that they're absolutes. In a traditional arena environment, you'd need to phrase them so that they aren't auto-effects when they strike. If you're fighting someone with ice powers, for instance, and you use the freeze arrow, they probably won't get immobilized if it hits them, even though you say that it absolutely will do that. I'm not sure if Light will require any clarification, but in my experience the more detail the better, as it allows your opponent to respond properly to the attacks.