Bubble 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, Bubble Barrier is Unlimited.
YGOPRODeck lists Bubble Barrier for these formats: Common Charity, TCG, OCG, Master Duel.
Bubble Barrier belongs to the Performage archetype—use that tag when searching for engine pieces and tech options.
A listed print of Bubble Barrier appears in 2016 Mega-Tin Mega Pack (MP16-EN084) at Common rarity.
Among markets shown on this page, the lowest listed snapshot for Bubble Barrier is about $0.07 on Cardmarket (prices change frequently).
