Supply Squad 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, Supply Squad is Unlimited.
YGOPRODeck lists Supply Squad for these formats: Speed Duel, Common Charity, TCG, OCG, Master Duel.
A listed print of Supply Squad appears in 2-Player Starter Set (STAS-EN037) at Common rarity.
Among markets shown on this page, the lowest listed snapshot for Supply Squad is about $0.05 on Cardmarket (prices change frequently).
