Spellbook of Eternity is a Normal Spell Card.
Spell Cards are usually activated from the hand on your turn unless their type gives another timing window.
On the current TCG and OCG Forbidden & Limited lists tracked here, Spellbook of Eternity is Unlimited.
YGOPRODeck lists Spellbook of Eternity for these formats: Duel Links, TCG, OCG, Master Duel.
Spellbook of Eternity belongs to the Spellbook archetype—use that tag when searching for engine pieces and tech options.
A listed print of Spellbook of Eternity appears in Abyss Rising (ABYR-EN058) at Rare rarity.
Among markets shown on this page, the lowest listed snapshot for Spellbook of Eternity is about $0.60 on TCGPlayer (prices change frequently).
