Thousand Knives 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, Thousand Knives is Unlimited.
YGOPRODeck lists Thousand Knives for these formats: GOAT, Speed Duel, OCG GOAT, Duel Links, Common Charity, Edison, TCG, OCG, Master Duel.
Thousand Knives belongs to the Dark Magician archetype—use that tag when searching for engine pieces and tech options.
A listed print of Thousand Knives appears in 2-Player Starter Set (STAX-EN012) at Common rarity.
Among markets shown on this page, the lowest listed snapshot for Thousand Knives is about $0.07 on Cardmarket (prices change frequently).
