Heartless Drop Off 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, Heartless Drop Off is Unlimited.
YGOPRODeck lists Heartless Drop Off for these formats: Duel Links, Common Charity, TCG, OCG, Master Duel.
A listed print of Heartless Drop Off appears in 2019 Gold Sarcophagus Tin Mega Pack (MP19-EN051) at Common rarity.
Among markets shown on this page, the lowest listed snapshot for Heartless Drop Off is about $0.03 on Cardmarket (prices change frequently).
