De-Spell is a Normal 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, De-Spell is Unlimited.
YGOPRODeck lists De-Spell for these formats: GOAT, OCG GOAT, Speed Duel, Duel Links, Common Charity, Edison, TCG, OCG, Master Duel.
A listed print of De-Spell appears in Speed Duel: Arena of Lost Souls (SBLS-EN037) at Common rarity.
Among markets shown on this page, the lowest listed snapshot for De-Spell is about $0.05 on Cardmarket (prices change frequently).
