Mist Body 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, Mist Body is Unlimited.
YGOPRODeck lists Mist Body for these formats: Common Charity, Edison, TCG, OCG, Master Duel.
A listed print of Mist Body appears in Gold Series (GLD1-EN036) at Common rarity.
Among markets shown on this page, the lowest listed snapshot for Mist Body is about $0.13 on Cardmarket (prices change frequently).
