Koa'ki Meiru Doom

WIND
During each of your End Phases, destroy this card unless you send 1 "Iron Core of Koa'ki Meiru" from your hand to the Graveyard or reveal 1 Fiend-Type monster in your hand. Negate the effects of LIGHT and DARK monsters that activate during the Main Phase.
1700
800

Fiend WIND Effect Monster 3 effect