Multiply is a Quick-Play 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, Multiply is Unlimited.
YGOPRODeck lists Multiply for these formats: OCG GOAT, Duel Links, Common Charity, Edison, TCG, OCG, Master Duel.
Multiply belongs to the Kuriboh archetype—use that tag when searching for engine pieces and tech options.
A listed print of Multiply appears in Crimson Crisis (CRMS-EN090) at Super Rare rarity.
Among markets shown on this page, the lowest listed snapshot for Multiply is about $0.13 on Cardmarket (prices change frequently).
