Nightmare Archfiends is a Normal 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, Nightmare Archfiends is Unlimited.
YGOPRODeck lists Nightmare Archfiends for these formats: Common Charity, Edison, TCG, OCG, Master Duel.
Nightmare Archfiends belongs to the Archfiend archetype—use that tag when searching for engine pieces and tech options.
A listed print of Nightmare Archfiends appears in Crimson Crisis (CRMS-EN068) at Short Print rarity.
Among markets shown on this page, the lowest listed snapshot for Nightmare Archfiends is about $0.17 on Cardmarket (prices change frequently).
