Swords of Concealing Light is a Continuous 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, Swords of Concealing Light is Unlimited.
YGOPRODeck lists Swords of Concealing Light for these formats: GOAT, OCG GOAT, Common Charity, Edison, TCG, OCG, Master Duel.
A listed print of Swords of Concealing Light appears in Battle Pack 2: War of the Giants (BP02-EN147) at Common rarity.
Among markets shown on this page, the lowest listed snapshot for Swords of Concealing Light is about $0.09 on Cardmarket (prices change frequently).
