Light of Intervention 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, Light of Intervention is Unlimited.
YGOPRODeck lists Light of Intervention for these formats: GOAT, OCG GOAT, Common Charity, Edison, TCG, OCG, Master Duel.
A listed print of Light of Intervention appears in Dark Beginning 1 (DB1-EN084) at Common rarity.
Among markets shown on this page, the lowest listed snapshot for Light of Intervention is about $0.04 on Cardmarket (prices change frequently).
