Amulet of Ambition 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, Amulet of Ambition is Unlimited.
YGOPRODeck lists Amulet of Ambition for these formats: Speed Duel, Duel Links, Common Charity, Edison, TCG, OCG, Master Duel.
A listed print of Amulet of Ambition appears in Speed Duel Starter Decks: Ultimate Predators (SS03-ENB23) at Common rarity.
Among markets shown on this page, the lowest listed snapshot for Amulet of Ambition is about $0.08 on Cardmarket (prices change frequently).
