Achilles Heelys

While you wear these boots, you can use a bonus action and click your heels together to eject a set of wheels.  While these wheels are ejected you can slide on your heels doubling your walking speed. Any opportunity attack has disadvantage while you move with this speed. You can use a bonus action to click your heels together again, ending the effect. 

You continue to gain the benefits of the effect so long as you move at least 10 feet each turn. If your movement is involuntarily stopped you are knocked prone you take 3d4 points of bludgeoning damage. It takes your full movement to get up while the heels are still active.

Notes: Bonus: Speed, It takes time to train to be able to use these wheel heels. A tradition passed on through a Dwarven clan. , Buff, Movement, Utility, Footwear