Insect Barrier is a Continuous Spell Card.
Spell Cards are usually activated from the hand on your turn unless their type gives another timing window.
On the current TCG and OCG Forbidden & Limited lists tracked here, Insect Barrier is Unlimited.
YGOPRODeck lists Insect Barrier for these formats: GOAT, OCG GOAT, Common Charity, Edison, Speed Duel, TCG, OCG, Master Duel.
A listed print of Insect Barrier appears in Dark Beginning 1 (DB1-EN205) at Common rarity.
Among markets shown on this page, the lowest listed snapshot for Insect Barrier is about $0.09 on Cardmarket (prices change frequently).
