Defender of the Labyrinth

2 Normal Monsters
Non-Effect Monsters you control gain 500 ATK, also all Effect Monsters your opponent controls lose 500 ATK. If this card in its owner's possession is destroyed by your opponent's card: You can target 1 non-Effect Monster in your GY; Special Summon it. You can only use this effect of "Defender of the Labyrinth" once per turn.