Mirror of Yata 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, Mirror of Yata is Unlimited.
YGOPRODeck lists Mirror of Yata for these formats: Duel Links, Common Charity, Edison, TCG, OCG, Master Duel.
A listed print of Mirror of Yata appears in The Duelist Genesis (TDGS-EN056) at Common rarity.
Among markets shown on this page, the lowest listed snapshot for Mirror of Yata is about $0.05 on Cardmarket (prices change frequently).
