دوجورادو، الأثر الحجري المتحرك

2+ monsters, including a Rock monster
If this card is Special Summoned: You can target 1 Rock monster in your GY; this card gains ATK equal to that monster's. During your opponent's Main Phase (Quick Effect): You can target 1 other monster on the field with ATK less than or equal to this card; this card loses ATK exactly equal to that monster's, and if it does, destroy that monster. You can only use each effect of "Dogurado the Moving Stone Relic" once per turn.