Maximum Overload

This Skill can be used if the only monsters with 2100 or less ATK in your Deck are Spellcaster Type or Machine Type. [REQUIREMENT] Send 1 Maximum Monster from your hand to the Graveyard. [EFFECT] Place 1 monster from your hand onto your field in face-down Defense Position. (Its battle position can be changed.) Then, you can decrease the ATK of 1 face-up monster on your opponent's field by 800 until the end of the turn. During the End Phase of this turn, return 1 Maximum Monster in your Graveyard to the top of the Deck.