Gem-Enhancement is a Normal Trap Card.
Trap Cards are normally Set first and can be activated on a later turn, often in response to an action.
On the current TCG and OCG Forbidden & Limited lists tracked here, Gem-Enhancement is Unlimited.
YGOPRODeck lists Gem-Enhancement for these formats: Duel Links, Speed Duel, TCG, OCG, Master Duel.
Gem-Enhancement belongs to the Gem- archetype—use that tag when searching for engine pieces and tech options.
A listed print of Gem-Enhancement appears in Duel Terminal 5a (DT05-EN049) at Duel Terminal Rare Parallel Rare rarity.
Among markets shown on this page, the lowest listed snapshot for Gem-Enhancement is about $0.29 on Cardmarket (prices change frequently).
