Activate this Skill while the only monster you control is "Serpent Night Dragon". Once per turn, you can reveal the top 4 cards of your Deck and do 1 of the following, based on the number of monsters revealed. 1: Add 1 of the revealed monsters to your hand. 2: Destroy 1 face-up card your opponent controls. 3+: Both of the above, in sequence. Then place the rest of the revealed cards on the bottom of your Deck in any order. You cannot Summon or Set monsters the turn you activate this Skill, except "Serpent Night Dragon".