Runick Allure is a Continuous 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, Runick Allure is Unlimited.
YGOPRODeck lists Runick Allure for these formats: TCG, OCG, Master Duel.
Runick Allure belongs to the Runick archetype—use that tag when searching for engine pieces and tech options.
A listed print of Runick Allure appears in 25th Anniversary Tin: Dueling Heroes Mega Pack (MP23-EN240) at Ultra Rare rarity.
Among markets shown on this page, the lowest listed snapshot for Runick Allure is about $0.13 on TCGPlayer (prices change frequently).
