Blind Obliteration 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, Blind Obliteration is Unlimited.
YGOPRODeck lists Blind Obliteration for these formats: TCG, OCG, Master Duel.
A listed print of Blind Obliteration appears in Code of the Duelist (COTD-EN079) at Rare rarity.
Among markets shown on this page, the lowest listed snapshot for Blind Obliteration is about $0.09 on Cardmarket (prices change frequently).
