Red-Eyes Insight 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, Red-Eyes Insight is Unlimited.
YGOPRODeck lists Red-Eyes Insight for these formats: Duel Links, Common Charity, TCG, OCG, Master Duel.
Red-Eyes Insight belongs to the Red-Eyes archetype—use that tag when searching for engine pieces and tech options.
A listed print of Red-Eyes Insight appears in Invasion: Vengeance (INOV-EN060) at Rare rarity.
Among markets shown on this page, the lowest listed snapshot for Red-Eyes Insight is about $0.38 on TCGPlayer (prices change frequently).
