Changes

Because [[Iron Core of Koa'ki Meiru]] may often be in the graveyard, it is vulnerable to cards that can remove it from play, such as [[Gladiator Beast Retiari]], [[D.D. Crow]], and [[Macro Cosmos]]. Also, having multiple [[Koa'ki Meiru]] monsters on the field at once can be extremely dangerous, as each one would require you to reveal or discard a card from your hand at the End Phase; leaving hand and field advantage very hard to maintain, unless multiple copies are used (for example, 3 Koa'ki Meiru Powerhands only require 1 Normal Trap Card revealed)