Out of the Blue 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, Out of the Blue is Unlimited.
YGOPRODeck lists Out of the Blue for these formats: Duel Links, Common Charity, TCG, OCG, Master Duel.
A listed print of Out of the Blue appears in Extreme Victory (EXVC-EN061) at Common rarity.
Among markets shown on this page, the lowest listed snapshot for Out of the Blue is about $0.03 on Cardmarket (prices change frequently).
