Humid Winds 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, Humid Winds is Unlimited.
YGOPRODeck lists Humid Winds for these formats: Duel Links, Common Charity, TCG, OCG, Master Duel.
Humid Winds belongs to the Aroma archetype—use that tag when searching for engine pieces and tech options.
A listed print of Humid Winds appears in 2016 Mega-Tin Mega Pack (MP16-EN092) at Common rarity.
Among markets shown on this page, the lowest listed snapshot for Humid Winds is about $0.27 on Cardmarket (prices change frequently).
