Light and Darkness Dragon

Cannot be Special Summoned. While face-up on the field, this card is also DARK-Attribute. Once per Chain, when a Spell/Trap Card, or monster effect, is activated (Quick Effect): This card loses exactly 500 ATK/DEF and that activation is negated. When this card is destroyed and sent to the GY: Target 1 monster in your GY (if possible); destroy all cards you control, also Special Summon that monster (if any).