I would choose the Wheel of Shadows. It seems to, so far, be an underused artifact. It grants the user the power to transverse time itself. I personally would use this artifact for good, ferrying souls lost to the sands of time to meet their final judgement. I would be an arbiter, a silent observer until I was needed. I believe that the Wheel of Shadows goes along with the Witchblade; it is another form of balance in the universe.