Storm 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, Storm is Unlimited.
YGOPRODeck lists Storm for these formats: Duel Links, Speed Duel, Common Charity, TCG, OCG, Master Duel.
A listed print of Storm appears in Astral Pack Seven (AP07-EN023) at Common rarity.
Among markets shown on this page, the lowest listed snapshot for Storm is about $0.08 on Cardmarket (prices change frequently).
