Creeping Darkness 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, Creeping Darkness is Unlimited.
YGOPRODeck lists Creeping Darkness for these formats: Duel Links, Speed Duel, Common Charity, TCG, OCG, Master Duel.
A listed print of Creeping Darkness appears in Destiny Soldiers (DESO-EN058) at Super Rare rarity.
Among markets shown on this page, the lowest listed snapshot for Creeping Darkness is about $0.10 on Cardmarket (prices change frequently).
