Ancient Gear Workshop 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, Ancient Gear Workshop is Unlimited.
YGOPRODeck lists Ancient Gear Workshop for these formats: Duel Links, Common Charity, Edison, TCG, OCG, Master Duel.
Ancient Gear Workshop belongs to the Ancient Gear archetype—use that tag when searching for engine pieces and tech options.
A listed print of Ancient Gear Workshop appears in Machine Reactor Structure Deck (SR03-EN024) at Common rarity.
Among markets shown on this page, the lowest listed snapshot for Ancient Gear Workshop is about $0.60 on TCGPlayer (prices change frequently).
