Dark Magic Curtain is a Normal 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, Dark Magic Curtain is Unlimited.
YGOPRODeck lists Dark Magic Curtain for these formats: OCG GOAT, Duel Links, Speed Duel, Common Charity, Edison, TCG, OCG, Master Duel.
Dark Magic Curtain belongs to the Dark Magician archetype—use that tag when searching for engine pieces and tech options.
A listed print of Dark Magic Curtain appears in Legendary Collection 3: Yugi's World Mega Pack (LCYW-EN079) at Rare rarity.
Among markets shown on this page, the lowest listed snapshot for Dark Magic Curtain is about $0.07 on Cardmarket (prices change frequently).
