Fusion Sage 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, Fusion Sage is Unlimited.
YGOPRODeck lists Fusion Sage for these formats: GOAT, OCG GOAT, Duel Links, Speed Duel, Common Charity, Edison, TCG, OCG, Master Duel.
A listed print of Fusion Sage appears in Dark Beginning 2 (DB2-EN109) at Common rarity.
Among markets shown on this page, the lowest listed snapshot for Fusion Sage is about $0.08 on Cardmarket (prices change frequently).
