De-Fusion is a Quick-Play 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-Fusion is Unlimited.
YGOPRODeck lists De-Fusion for these formats: GOAT, OCG GOAT, Duel Links, Speed Duel, Common Charity, Edison, TCG, OCG, Master Duel.
A listed print of De-Fusion appears in Dark Beginning 2 (DB2-EN029) at Common rarity.
Among markets shown on this page, the lowest listed snapshot for De-Fusion is about $0.16 on Cardmarket (prices change frequently).
