Nightmare Magician (Quarter Century Secret Rare) (DUNE-EN025) - Duelist Nexus 1st Edition Condition:Lightly Played Both you and your opponent

Both you and your opponent can then Special Summon from your hand the same number of Monster Cards on the field in face-down Defense Position

Xyz Materials attached to that target also become Xyz Materials on the Summoned monster

If you control this card that was Xyz Summoned this turn by using an "Exosister" monster as material (Quick Effect): You can target 1 card your opponent controls or in their GY

Flames of Destruction

add 1 Dragon monster from your Deck to your hand

Nightmare Magician (Quarter Century Secret Rare) (DUNE-EN025) - Duelist Nexus 1st Edition Condition:Lightly Played Both you and your opponentTypeIllusion Effect Monster AttributeDARK Level Rank7 ATK DEF2500 2000 Card TextIf this card battles a monster, neither can be destroyed by that battle. At the end of the Damage Step, if this card battled an opponent's monster: You can take control of that opponent's monster. Once per turn, at the start of the Damage Step, if another monster attacks: You can destroy 1 card on the field.