Cursed Armaments is a Equip 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, Cursed Armaments is Unlimited.
YGOPRODeck lists Cursed Armaments for these formats: Duel Links, Common Charity, TCG, OCG, Master Duel.
A listed print of Cursed Armaments appears in Battle Pack 2: War of the Giants (BP02-EN159) at Common rarity.
Among markets shown on this page, the lowest listed snapshot for Cursed Armaments is about $0.10 on TCGPlayer (prices change frequently).
