Light and Darkness Dragonlord

“1 Level 8 LIGHT Dragon monster + 1 Level 8 DARK Dragon monster Must be Fusion Summoned. While face-up on the field, this card is also DARK-Attribute. Once per Chain, if a Spell/Trap Card, or monster effect, is activated (Quick Effect): This card loses exactly 1000 ATK/DEF, and if it does, negate the activation. If this card in its owner's possession is destroyed by an opponent's card: You can target 1 Dragon monster in your GY; Special Summon it.”