Snake Whistle is a Normal Trap Card.
Trap Cards are normally Set first and can be activated on a later turn, often in response to an action.
On the current TCG and OCG Forbidden & Limited lists tracked here, Snake Whistle is Unlimited.
YGOPRODeck lists Snake Whistle for these formats: Duel Links, Common Charity, Edison, TCG, OCG, Master Duel.
A listed print of Snake Whistle appears in Tactical Evolution (TAEV-EN066) at Common rarity.
Among markets shown on this page, the lowest listed snapshot for Snake Whistle is about $0.16 on Cardmarket (prices change frequently).
