Cold Feet 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, Cold Feet is Unlimited.
YGOPRODeck lists Cold Feet for these formats: Duel Links, TCG, OCG, Master Duel.
A listed print of Cold Feet appears in Return of the Duelist (REDU-EN065) at Short Print rarity.
Among markets shown on this page, the lowest listed snapshot for Cold Feet is about $0.11 on TCGPlayer (prices change frequently).
