Hero Flash!! 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, Hero Flash!! is Unlimited.
YGOPRODeck lists Hero Flash!! for these formats: Duel Links, Common Charity, Edison, TCG, OCG, Master Duel.
Hero Flash!! belongs to the Elemental HERO archetype—use that tag when searching for engine pieces and tech options.
A listed print of Hero Flash!! appears in Dark Revelation Volume 4 (DR04-EN222) at Common rarity.
Among markets shown on this page, the lowest listed snapshot for Hero Flash!! is about $0.08 on Cardmarket (prices change frequently).
