Melffy Hide-and-Seek is a Continuous 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, Melffy Hide-and-Seek is Unlimited.
YGOPRODeck lists Melffy Hide-and-Seek for these formats: Common Charity, TCG, OCG, Master Duel.
Melffy Hide-and-Seek belongs to the Melffy archetype—use that tag when searching for engine pieces and tech options.
A listed print of Melffy Hide-and-Seek appears in 2021 Tin of Ancient Battles (MP21-EN140) at Common rarity.
Among markets shown on this page, the lowest listed snapshot for Melffy Hide-and-Seek is about $0.05 on Cardmarket (prices change frequently).
