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Description
When this card is activated; You can send 1 "Spellbook" Spell from your Deck to the GY, except "Spellbook Library in the Abyss". If the activation or effect of a "Spellbook" card or Spellcaster monster in your possession would be negated, while your opponent controls at least as many cards as you do, you can destroy this face-up card instead. You can only use this effect of "Spellbook Library in the Abyss" once per turn. While you control this face-up card, you cannot activate effects, except the effects of "Spellbook" cards and Spellcaster monsters.

Description
When this card is activated; You can send 1 "Spellbook" Spell from your Deck to the GY, except "Spellbook Library in the Abyss". If the activation or effect of a "Spellbook" card or Spellcaster monster in your possession would be negated, while your opponent controls at least as many cards as you do, you can destroy this face-up card instead. You can only use this effect of "Spellbook Library in the Abyss" once per turn. While you control this face-up card, you cannot activate effects, except the effects of "Spellbook" cards and Spellcaster monsters.