Canyon is a Field 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, Canyon is Unlimited.
YGOPRODeck lists Canyon for these formats: Duel Links, Common Charity, Edison, TCG, OCG, Master Duel.
A listed print of Canyon appears in Structure Deck: Invincible Fortress (SD7-EN016) at Common rarity.
Among markets shown on this page, the lowest listed snapshot for Canyon is about $0.40 on TCGPlayer (prices change frequently).
