Stellarknight Constellar Diamond (Quarter Century Secret Rare)

3+ Level 5 LIGHT monsters
During your Main Phase 2, you can also Xyz Summon this card by using a tellarknight Xyz Monster you control as material, except Stellarknight Constellar Diamond. (Transfer its materials to this card.) While this card has material, neither player can send cards from the Deck to the GY, and any card that returns from the GY to the hand is banished instead. When an opponent's DARK monster's effect is activated (Quick Effect): You can detach 1 material from this card; negate that activation, and if you do, destroy it.