Before you go into the arena make sure you have plenty of armor points, health potions and the obsedion sord also make sure your life bar is quite big.

You will also need the sharp augmentation and
At least the flame ball and heal life spell

When you kill the stone trolls you go against a giant scorpion but don't panic if you followed my previus instructions this will be easy just keep going round the arena and wisper will start attaking the scorpion just keep throwing the fire balls at it and when it plunges it's stinger into the ground run as far away from the spot you were
standing and carry on.