Threatening Roar 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, Threatening Roar is Unlimited.
YGOPRODeck lists Threatening Roar for these formats: GOAT, OCG GOAT, Common Charity, Edison, TCG, OCG, Master Duel.
A listed print of Threatening Roar appears in Battle Pack 2: War of the Giants (BP02-EN184) at Common rarity.
Among markets shown on this page, the lowest listed snapshot for Threatening Roar is about $0.01 on TCGPlayer (prices change frequently).
