Factory of 100 Machines 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, Factory of 100 Machines is Unlimited.
YGOPRODeck lists Factory of 100 Machines for these formats: Duel Links, Common Charity, Edison, TCG, OCG, Master Duel.
Factory of 100 Machines belongs to the Morphtronic archetype—use that tag when searching for engine pieces and tech options.
A listed print of Factory of 100 Machines appears in Crossroads of Chaos (CSOC-EN049) at Common rarity.
Among markets shown on this page, the lowest listed snapshot for Factory of 100 Machines is about $0.10 on TCGPlayer (prices change frequently).
