Curse of Darkness 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, Curse of Darkness is Unlimited.
YGOPRODeck lists Curse of Darkness for these formats: GOAT, OCG GOAT, Duel Links, Common Charity, Edison, TCG, OCG, Master Duel.
A listed print of Curse of Darkness appears in Dark Revelation Volume 2 (DR2-EN107) at Rare rarity.
Among markets shown on this page, the lowest listed snapshot for Curse of Darkness is about $0.14 on Cardmarket (prices change frequently).
