Deck Master: "Shinato, King of a Higher Plane"

You can only use this Skill's first and second effects once per Duel. 1: During your Main Phase, play 1 "Shinato, King of a Higher Plane" from outside your Deck in face-down Defense Position. (Its battle position can be changed.) 2: If you control "Shinato, King of a Higher Plane", change an Attack Position monster your opponent controls to Defense Position. Then, halve your opponent's LP. During this rest of this Duel, your opponent will take no effect damage except that of "Shinato, King of a Higher Plane".