During your turn: Target 2 Spell Cards in your Graveyard; shuffle those targets into the Deck.
If you have no "Spellbook" Spell Cards in your Graveyard: Reveal 3 "Spellbook" Spell Cards with different names from your Deck, your opponent randomly adds 1 of them to your hand, and shuffle the rest back into your Deck. You can only activate 1 "Spellbook Library of the Crescent" per turn. You cannot activate any Spell Cards the turn you activate this card, except "Spellbook" Spell Cards.
If you have 5 or more "Spellbook" Spell Cards in your Graveyard: Excavate the top 2 cards of your Deck, add any excavated "Spellbook" Spell Cards to your hand, also shuffle the other cards into the Deck. You can only activate 1 "Spellbook Library of the Heliosphere" per turn. You cannot activate any Spell Cards the turn you activate this card, except "Spellbook" Spell Cards.
If this card is Normal Summoned or flipped face-up: Add 1 "Spellbook" Spell from your Deck to your hand.
Target 1 of your banished "Spellbook" Spell Cards, except "Spellbook of Eternity"; add that target to your hand. You can only activate 1 "Spellbook of Eternity" per turn.
If you control a Spellcaster-Type monster: You can banish up to 3 "Spellbook" Spell Cards from your Graveyard; apply this effect, depending on the number of Spell Cards banished for this card's activation. You can only activate 1 "Spellbook of Fate" per turn.
● 1: Return 1 Set Spell/Trap Card on the field to the hand.
● 2: Change 1 monster on the field to face-down Defense Position or face-up Attack Position.
● 3: Banish 1 card your opponent controls.
During the End Phase of the turn this card was activated, add "Spellbook" Spell Cards from your Deck to your hand, except "Spellbook of Judgment", up to the number of Spell Cards activated after this card's resolution, then, you can Special Summon from your Deck 1 Spellcaster-Type monster whose Level is less than or equal to the number of cards added to your hand by this effect. You can only activate 1 "Spellbook of Judgment" per turn.
Send to the GY either 1 Spellcaster monster you control, or 1 other "Spellbook" card from your hand or face-up field, except "Spellbook of Knowledge", and if you do, draw 2 cards. You can only activate 1 "Spellbook of Knowledge" per turn.
Banish 1 Spellcaster-Type monster from your Graveyard and reveal 1 other "Spellbook" Spell Card in your hand to target 1 Spellcaster-Type monster in your Graveyard; Special Summon that target in face-up Attack Position and equip it with this card. The equipped monster's Level is increased by the Level of the monster that was banished for this card's activation. You can only activate 1 "Spellbook of Life" per turn.
Target 1 Spellcaster-Type Xyz Monster in your Graveyard and up to 2 of your banished "Spellbook" Spell Cards; Special Summon that monster, and if you do, attach the targeted "Spellbook" Spell Card(s) to it as Xyz Material. You can only activate 1 "Spellbook of Miracles" per turn.
Target 1 Spellcaster monster you control; this turn, it gains 1000 ATK. And if it does, each time it destroys an opponent's monster by battle this turn: You can add 1 "Spellbook" Spell from your Deck to your hand. You can only activate 1 "Spellbook of Power" per turn.
Add 1 "Spellbook" card from your Deck to your hand, except "Spellbook of Secrets". You can only activate 1 "Spellbook of Secrets" per turn.
Add 4 "Charmer" monsters with different Attributes from your Deck, GY, and/or banishment to your hand, then shuffle 2 cards from your hand into the Deck. You can banish this card from your GY; Fusion Summon 1 Fusion Monster from your Extra Deck, using "Charmer" or "Familiar-Possessed" monsters from your hand or field, also your opponent cannot activate cards or effects when a monster is Fusion Summoned this way. You can only use each effect of "Spellbook of the Grand Circle" once per turn.
If you control a Spellcaster-Type monster: You can reveal 1 other "Spellbook" card in your hand, then target 1 "Spellbook" Normal Spell Card in your Graveyard, except "Spellbook of the Master"; this card's effect becomes that target's effect. You can only activate 1 "Spellbook of the Master" per turn.
Target 1 Spellcaster monster on the field, then activate 1 of these effects;
● That face-up monster is unaffected by other Spell effects this turn.
● That face-up monster is unaffected by Trap effects this turn.
Look at the top 3 cards of your Deck, then return them to the top of the Deck in any order.
Each time a "Spellbook" Spell Card is activated, place 1 Spell Counter on this card. All Spellcaster-Type monsters you control gain 100 ATK for each Spell Counter on this card. When this card with Spell Counter(s) is destroyed and sent to the Graveyard: You can add 1 Spellcaster-Type monster from your Deck to your hand, whose Level is less than or equal to the number of Spell Counters that were on this card.
Once per turn, during your Standby Phase, if you have a Spellcaster-Type monster on your side of the field or in your Graveyard: You can place 1 "Spellbook" Spell Card from your Graveyard on the bottom of your Deck, except "The Grand Spellbook Tower", then draw 1 card. When this card in your possession is destroyed by your opponent's card and sent to your Graveyard: You can Special Summon 1 Spellcaster-Type monster from your hand or Deck whose Level is less than or equal to the number of "Spellbook" Spell Cards in your Graveyard.