You can only use the (1)st and (2)nd effects of this card’s name each once per turn.
(1) If this card is Special Summoned: You can target 1 Rock monster in your GY; this card gains ATK equal to that monster’s.
(2) During your opponent’s Main Phase (Quick Effect): You can target 1 other monster on the field with ATK equal to or less than this card’s; this card loses ATK equal to that monster’s, and if it does, destroy that monster.