Wetlands 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, Wetlands is Unlimited.
YGOPRODeck lists Wetlands for these formats: Duel Links, Common Charity, Edison, TCG, OCG, Master Duel.
A listed print of Wetlands appears in Light of Destruction (LODT-EN054) at Common rarity.
Among markets shown on this page, the lowest listed snapshot for Wetlands is about $0.06 on Cardmarket (prices change frequently).
