Horn of Heaven is a Counter 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, Horn of Heaven is Unlimited.
YGOPRODeck lists Horn of Heaven for these formats: GOAT, OCG GOAT, Edison, TCG, OCG, Master Duel.
A listed print of Horn of Heaven appears in Dark Beginning 2 (DB2-EN076) at Rare rarity.
Among markets shown on this page, the lowest listed snapshot for Horn of Heaven is about $0.69 on Cardmarket (prices change frequently).
