Studied Target (Swift)

A slayer can study an opponent he can see as a move action. The slayer then gains a +1 bonus on weapon attack and damage rolls against it. The DCs of slayer class abilities against that opponent increase by 1. If a slayer deals sneak attack damage to a target, he studies that target, allowing him to apply his studied target bonuses against that target (including to the normal weapon damage roll). At 5th, 10th, 15th, and 20th levels, the bonuses on weapon attack rolls, damage rolls and to slayer DCs against a studied target increase by 1. At 7th level, a slayer can study an opponent as a move or swift action.