Silent Flight IV

Feat Description
This feat allows the Ranger to fire off a single arrow at an unaware target; causing significant damage and possibly stunning the target. The damage done is equal to normal arrow damage + an amount of damage equal to the archer's full dexterity score. If addition, the archer gain one additional arrow strike which causes normal damage at level 12. While these additional arrows do not do the bonus damage, they each have potential to score a Critical strike. The target must save versus Will (DC=22) or be dazed for 5 rounds. If the target suffers damage during that 5 rounds, he will recover immediately from the daze effect. This special attack has a 10 minute cooldown. 

Silent Flight All, Scout Gatekeeper