The Ra'ul is a light weapon introduced in the Skycages update of Infinity Blade II. It has +490 to Attack and two circle and one triangle gem slots. The weapon can be purchased in the store for 700,000 if you have sold it before. You can find it in a Big or Rare Prize Wheel, or by defeating the Petrified Noc found in the leftmost Skycages.
The Ra'ul can also be found in Infinity Blade III with +7 raw attack and +7 poison damage. It is a light weapon for Isa and comes at level 1. The Ra'ul is a locked item and can only be obtained randomly.