Spirit Barrier is a Continuous 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, Spirit Barrier is Unlimited.
YGOPRODeck lists Spirit Barrier for these formats: GOAT, OCG GOAT, Duel Links, Common Charity, Edison, TCG, OCG, Master Duel.
A listed print of Spirit Barrier appears in Champion Pack: Game Five (CP05-EN020) at Common rarity.
Among markets shown on this page, the lowest listed snapshot for Spirit Barrier is about $0.99 on eBay (prices change frequently).
