Quantum Cat is a Continuous 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, Quantum Cat is Unlimited.
YGOPRODeck lists Quantum Cat for these formats: Duel Links, Speed Duel, Common Charity, TCG, OCG, Master Duel.
A listed print of Quantum Cat appears in Battle Pack 3: Monster League (BP03-EN237) at Common rarity.
Among markets shown on this page, the lowest listed snapshot for Quantum Cat is about $0.09 on Cardmarket (prices change frequently).
