Broken Line is a Counter 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, Broken Line is Unlimited.
YGOPRODeck lists Broken Line for these formats: TCG, OCG, Master Duel.
A listed print of Broken Line appears in 2018 Mega-Tin Mega Pack (MP18-EN156) at Ultra Rare rarity.
Among markets shown on this page, the lowest listed snapshot for Broken Line is about $0.02 on Cardmarket (prices change frequently).
