Dark Nephthys [PTDN-EN018] Ultimate Rare Battle Kit when an opponent's DARK monster

when an opponent's DARK monster activates its effect: You can detach 1 Xyz Material from this card

Set: Wizards of the Coast: Black Star Promos Type: Fire Rarity: Black Star Promo Retreat cost: Colorless

but its original ATK becomes 0

You cannot Special Summon monsters the turn you activate this effect

Set: Black & White: Black Star Promos Type: Dragon Rarity: Promo Retreat cost: Colorless

Dark Nephthys [PTDN-EN018] Ultimate Rare Battle Kit when an opponent's DARK monsterSet: Phantom Darkness Card type: Effect Monster Rarity: Ultimate Rare Attack: 2400 Defense: 1600 If this card is in your hand and there are 3 or more DARK monsters in your Graveyard, you can remove from play 2 of them to send it to the Graveyard. If this card is sent to the Graveyard by this effect, Special Summon it during your next Standby Phase. When this card is Special Summoned, destroy 1 Spell or Trap Card.