Gouki The Giant Ogre

3+ "Gouki" monsters <br>Cannot be destroyed by battle. Unaffected by activated effects from an opponent's monster whose ATK is equal to or lower than this card's ATK. When your opponent activates a card or effect that targets this card and/or a monster(s) it points to (Quick Effect): You can make this card lose exactly 500 ATK, and if you do, negate the activation. Once per turn, if this card's current ATK is different from its original ATK (Quick Effect): You can make this card gain 1000 ATK until the end of this turn.