Serial Spell is a Quick-Play 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, Serial Spell is Unlimited.
YGOPRODeck lists Serial Spell for these formats: GOAT, OCG GOAT, Edison, TCG, OCG, Master Duel.
A listed print of Serial Spell appears in Dark Revelation Volume 3 (DR3-EN097) at Rare rarity.
Among markets shown on this page, the lowest listed snapshot for Serial Spell is about $0.97 on Cardmarket (prices change frequently).
