Your base speed increases by 10 feet. At 7th level, you gain a +1 bonus on attack rolls with a metal weapon in any round in which you move at least 10 feet. This bonus increases by +1 at 11th level, and every four levels thereafter. At 11th level, as a move action, you can maneuver your weapon to create a shield of whirling steel around yourself until the start of your next turn; non-incorporeal melee and ranged attacks against you have a 20% miss chance while the shield is active. You must be wielding a metal weapon to use this ability.