Libromancer Intervention is a Normal Trap Card.
Trap Cards are normally Set first and can be activated on a later turn, often in response to an action.
On the current TCG and OCG Forbidden & Limited lists tracked here, Libromancer Intervention is Unlimited.
YGOPRODeck lists Libromancer Intervention for these formats: Common Charity, TCG, Master Duel.
Libromancer Intervention belongs to the Libromancer archetype—use that tag when searching for engine pieces and tech options.
A listed print of Libromancer Intervention appears in 25th Anniversary Tin: Dueling Heroes Mega Pack (MP23-EN049) at Common rarity.
Among markets shown on this page, the lowest listed snapshot for Libromancer Intervention is about $0.08 on Cardmarket (prices change frequently).
