Red-Eyes Flare Metal Dragon (Quarter Century Secret Rare)

2 Level 7 monsters Cannot be destroyed by card effects while it has Xyz Material. While this card has Xyz Material, each time your opponent activates a card or effect, inflict 500 damage to your opponent immediately after it resolves. Once per turn, during either player's turn: You can detach 1 Xyz Material from this card, then target 1 "Red-Eyes" Normal Monster in your Graveyard; Special Summon it.