Whirling Dervish

You are a whirling flurry of blades, blood and steel. Your speed increases by 5 feet. When you hit a creature with a melee weapon attack, you may move 5 feet as part of the attack. Additionally, when you hit a creature you haven't struck yet this turn, you deal an additional +3 damage of your weapon's type to the target. Each target you strike after the first suffers an additional +3 damage of your weapon's type. If your weapon deals multiple types of damage, you choose what type of damage is suffered by the target.