Weaponkenesis (3.5e Power)

The sword flies out of your hands, cutting the goblin's neck before snapping back into your hand in one motion.

When you manifest this power, you gain +5 ft reach until the end of your turn, allowing you to attack farther away. You can use any of your normal abilities used for melee, even combat maneuvers such as disarming and grappling, though maneuvers which you must maintain (like grappling) cease at the end of your turn.

Augment: For every additional power point you spend, the reach increases by +5 ft.

For every additional power point you spend, you can make the duration last 1 round (or 1 additional round beyond that). This allows you to take attacks of opportunity with your new advanced reach.