Oops! 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, Oops! is Unlimited.
YGOPRODeck lists Oops! for these formats: Duel Links, Common Charity, TCG, OCG, Master Duel.
A listed print of Oops! appears in 2018 Mega-Tin Mega Pack (MP18-EN223) at Common rarity.
Among markets shown on this page, the lowest listed snapshot for Oops! is about $0.06 on Cardmarket (prices change frequently).
