Terraforming is a Normal Spell Card.
Spell Cards are usually activated from the hand on your turn unless their type gives another timing window.
Ban status for Terraforming: TCG Limited, OCG Limited. Confirm the latest list for your event or online format before you main it.
YGOPRODeck lists Terraforming for these formats: GOAT, OCG GOAT, Duel Links, Common Charity, Edison, TCG, OCG, Master Duel.
A listed print of Terraforming appears in Astral Pack One (AP01-EN009) at Super Rare rarity.
Among markets shown on this page, the lowest listed snapshot for Terraforming is about $0.07 on Cardmarket (prices change frequently).
