Multiplication of Ants is a Normal 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, Multiplication of Ants is Unlimited.
YGOPRODeck lists Multiplication of Ants for these formats: GOAT, OCG GOAT, Duel Links, Common Charity, Edison, Speed Duel, TCG, OCG, Master Duel.
A listed print of Multiplication of Ants appears in Dark Revelation Volume 2 (DR2-EN099) at Common rarity.
Among markets shown on this page, the lowest listed snapshot for Multiplication of Ants is about $0.05 on Cardmarket (prices change frequently).
