Iron Core of Koa'ki Meiru 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, Iron Core of Koa'ki Meiru is Unlimited.
YGOPRODeck lists Iron Core of Koa'ki Meiru for these formats: Duel Links, Common Charity, Edison, TCG, OCG, Master Duel.
Iron Core of Koa'ki Meiru belongs to the Koa'ki Meiru archetype—use that tag when searching for engine pieces and tech options.
A listed print of Iron Core of Koa'ki Meiru appears in Duelist Pack Collection Tin 2009 (RGBT-ENPP1) at Ultra Rare rarity.
Among markets shown on this page, the lowest listed snapshot for Iron Core of Koa'ki Meiru is about $0.13 on Cardmarket (prices change frequently).
