Xyz Block 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, Xyz Block is Unlimited.
YGOPRODeck lists Xyz Block for these formats: Duel Links, Common Charity, TCG, OCG, Master Duel.
A listed print of Xyz Block appears in 2014 Mega-Tin Mega Pack (MP14-EN047) at Common rarity.
Among markets shown on this page, the lowest listed snapshot for Xyz Block is about $0.08 on Cardmarket (prices change frequently).
