Core Overclock is a Super Rare Spell Card card from Yu-Gi-Oh! (The Shining Darkness, TSHD). Current market price: $0.30.
Super Rare
The Shining Darkness (TSHD)
Card Text
All face-up "Koa'ki Meiru" monsters you control gain 500 ATK. Once per turn, during your Main Phase, you can discard 1 "Iron Core of Koa'ki Meiru" to have all face-up "Koa'ki Meiru" monsters you control gain 1000 ATK, until the End Phase.
