The official GemStone IV encyclopedia.
Predator's Eye is a combat maneuver available to Rogues only.
This is a Martial Stance that improves one's ability to successfully hit aimed at body locations when ambushing targets. This ability will only activate with melee weapons (base speed 3 seconds or less), a closed fist, dagger or unarmed combat's jab and punch attacks. It does not work with any ranged weapons.
The chance to hit the aimed at body part increases by 4% at rank 1, 7% at rank 2 and 10% at rank 3.