Vile Germs is a Equip 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, Vile Germs is Unlimited.
YGOPRODeck lists Vile Germs for these formats: GOAT, OCG GOAT, Duel Links, Edison, Common Charity, TCG, OCG, Master Duel.
A listed print of Vile Germs appears in Legend of Blue Eyes White Dragon (LOB-090) at Short Print rarity.
Among markets shown on this page, the lowest listed snapshot for Vile Germs is about $0.03 on Cardmarket (prices change frequently).
