World Legacy's Secret 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, World Legacy's Secret is Unlimited.
YGOPRODeck lists World Legacy's Secret for these formats: Duel Links, TCG, OCG, Master Duel.
World Legacy's Secret belongs to the Mekk-Knight archetype—use that tag when searching for engine pieces and tech options.
A listed print of World Legacy's Secret appears in 2018 Mega-Tin Mega Pack (MP18-EN218) at Ultra Rare rarity.
Among markets shown on this page, the lowest listed snapshot for World Legacy's Secret is about $0.44 on Cardmarket (prices change frequently).
