Pendulum 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, Pendulum Storm is Unlimited.
YGOPRODeck lists Pendulum Storm for these formats: Common Charity, TCG, OCG, Master Duel.
A listed print of Pendulum Storm appears in Breakers of Shadow (BOSH-EN057) at Super Rare rarity.
Among markets shown on this page, the lowest listed snapshot for Pendulum Storm is about $0.08 on Cardmarket (prices change frequently).
