Sword of Deep-Seated is a Equip 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, Sword of Deep-Seated is Unlimited.
YGOPRODeck lists Sword of Deep-Seated for these formats: GOAT, Speed Duel, OCG GOAT, Duel Links, Common Charity, Edison, TCG, OCG, Master Duel.
A listed print of Sword of Deep-Seated appears in Metal Raiders (MRD-132) at Common rarity.
Among markets shown on this page, the lowest listed snapshot for Sword of Deep-Seated is about $0.04 on Cardmarket (prices change frequently).
