Precognition

Precognition is the ability to see the future. This would mean having better accuracy and even the possibility of evading attacks in player-vs-player combat.

This could be implemented in a mod by having weapon that doesn't miss in that it will cause damage to any mob or player in the general area in front of the player. The effect of evading an attack could be simulated by having the attacked player occasionally not receive damage as if he were in creative mode for a few seconds.