This card cannot be Normal Summoned or Set. This card can only be Special Summoned by removing from play 1 "Iron Core of Koa'ki Meiru" from your hand. During each of your End Phases, destroy this card unless you send 1 "Iron Core of Koa'ki Meiru" or 1 "Koa'ki Meiru" monster from your hand to the Graveyard. Once per turn, during your Main Phase, you can select and destroy 1 card your opponent controls.
The irony is that Koa'ki Meiru also have an early/mid-game boss, Valafar. We just didn't get that here. (Not that Koa'ki Meiru need it. Or most of the non-Rock/Beast-Warrior members of the archetype, but that's beside the point.)