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 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.
Use these cards to retrieve your banished Spellbook cards. Spellbook of Eternity adds a banished Spellbook spell card back to hand. Wheel of Prophecy, when special summoned by another Spellcaster-type monster, allows you to return as many banished Spellbook spell cards back to the deck and return the rest of them to your graveyard.
Here are some Spellbook spell cards that support the Prophecy Archetype and Spellcasters in general. Remove them from the Graveyard to activate the effect of Spellbook of Fate.
This card is the only reason that SB is even good, a quick play banish is sometimes all it takes to turn the duel around. Unfortunately for this deck users it’s only a rare card, so it’s a prime target to get limited or even forbidden when it’s this decks turn to get nurfed.
Keep in mind this card doesn't target. You'll need to decide whether to chain to it BEFORE they pick a card. (So if you had 2 face-downs and chain one, they'll just return the other, not just completely waste the Fate.) Matters more for the banish effect, but worth keeping in mind anyway.
How is the most aidsy card in history of DL not UR?