Koa'ki Meiru Shield

Normal Trap

Activate only when your opponent's monster declares an attack if you have 2 or more "Iron Core of Koa'ki Meiru" in your Graveyard. Destroy all face-up Attack Position monsters your opponent controls.

Rulings – Yugipedia

Printings:

The Shining Darkness: TSHD-EN077 (Rare) - 2010-05-07

Prices:

Cardmarket: 0.21 €
TCGplayer: $ 0.12