Dragonox, the Empowered Warrior

Card text

[ Pendulum Effect ] When an opponent's monster declares an attack: You can destroy this card, then end the Battle Phase. [ Monster Effect ] Once per turn: You can discard 1 card, then target 1 Warrior or Spellcaster-Type monster with 2000 or less ATK in your Graveyard; Special Summon it in face-down Defense Position.