Dark Order: "Book of Moon"

You can use this Skill's first and second effects once per Duel (1 effect per turn) if your Deck (excluding the Extra Deck) contains 7 or more DARK monsters. 1: From turn 2 onward, reveal 1 DARK monster in your hand, then shuffle 1 card from your hand into the Deck and add 1 "Book of Moon" from your Deck to your hand. 2: Place 1 "Book of Moon" from your hand on the bottom of the Deck, then draw 1 card.