The Phantom Knights of Ancient Cloak

If this card is in Attack Position: You can target 1 DARK monster on the field; change this card to Defense Position, and if you do, that monster gains 800 ATK and DEF until the end of your opponent's turn. You can banish this card from your Graveyard; add 1 "The Phantom Knights" card from your Deck to your hand, except "The Phantom Knights of Ancient Cloak". You can only use each effect of "The Phantom Knights of Ancient Cloak" once per turn.