Landrobe the Rock Vassal - Emperor of Darkness Structure Deck

If this card is in your hand: You can target 1 face-up monster your opponent controls; you cannot Special Summon monsters from the Extra Deck for the rest of this turn, also Special Summon this card, and if you do, change that monster to face-down Defense Position. If this card is Tributed for a Tribute Summon: You can target 1 monster with 800 ATK and 1000 DEF in your Graveyard, except "Landrobe the Rock Vassal"; add it to your hand. You can only use each effect of "Landrobe the Rock Vassal" once per turn.