Ballista Squad is a Normal 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, Ballista Squad is Unlimited.
YGOPRODeck lists Ballista Squad for these formats: Duel Links, Common Charity, TCG, OCG, Master Duel.
A listed print of Ballista Squad appears in 2019 Gold Sarcophagus Tin Mega Pack (MP19-EN132) at Common rarity.
Among markets shown on this page, the lowest listed snapshot for Ballista Squad is about $0.11 on Cardmarket (prices change frequently).
