RD/KP04-JP060 Juukikai Ougi Juu no Ken / Beast Gear World Secret Technique – Fist of the Beast
Normal Trap
{Requirement} When an opponent’s monster declares an attack on a face-up monster (Level 7 to 9 Beast-Warrior, Fiend, or Machine) you control.
{Effect} Change the attacking monster to Defense Position. Then, if you changed a monster (Dragon, Spellcaster, or Fairy) to Defense Position with this effect, you can choose and destroy 1 Spell/Trap Card your opponent controls.

Source