Vex Giant

When you cast vex giant, your senses and reflexes become particularly honed against a single target within 60 feet, provided the target is at least one size category larger than you. You may select your focused foe as a free action when you cast this spell—switching your focus to a different foe within 60 feet is a move action. If a foe moves beyond 60 feet from you, you lose your focus on that foe, although you may regain it by moving within 60 feet and spending a move action. Although the name of the spell is vex giant, it works equally well on any foe that’s at least one size category larger than you.

Against a foe you are focused on, you do not provoke attacks of opportunity by moving through their threatened area. Additionally, the first successful melee attack you make against the foe in a round deals an additional 1d6 points of damage. Finally, you gain a +4 insight bonus on all combat maneuver checks made against your focused foe.