Core Overclock 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, Core Overclock is Unlimited.
YGOPRODeck lists Core Overclock for these formats: Duel Links, TCG, OCG, Master Duel.
Core Overclock belongs to the Koa'ki Meiru archetype—use that tag when searching for engine pieces and tech options.
A listed print of Core Overclock appears in The Shining Darkness (TSHD-EN087) at Super Rare rarity.
Among markets shown on this page, the lowest listed snapshot for Core Overclock is about $0.21 on TCGPlayer (prices change frequently).
