Legendary Wind-Up Key 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, Legendary Wind-Up Key is Unlimited.
YGOPRODeck lists Legendary Wind-Up Key for these formats: Duel Links, Common Charity, TCG, OCG, Master Duel.
Legendary Wind-Up Key belongs to the Wind-Up archetype—use that tag when searching for engine pieces and tech options.
A listed print of Legendary Wind-Up Key appears in Generation Force (GENF-EN053) at Common rarity.
Among markets shown on this page, the lowest listed snapshot for Legendary Wind-Up Key is about $0.14 on Cardmarket (prices change frequently).
