Dance of Chains (3.5e Maneuver)

Your twirling, whirling weaponry is always ready to ensnare an opponent.

At any point in which an opponent is about to attack you in melee, you may initiate this maneuver to gain a free grapple attempt that does not provoke attacks of opportunity. If successful, that attack takes a -4 penalty and from then on normal grapple rules apply.