Armor Ninjitsu Art of Freezing (OP02-EN012) - OTS Tournament Pack 2 Unlimited

When an opponent's monster declares an attack, if you control a "Ninja" monster: You can flip this card face-up; negate that attack and end the Battle Phase. While this card is face-up on the field and you control a "Ninja" monster, monsters your opponent controls cannot change their battle positions.