From the box:
A long time ago, before our history began, wizards - both good and evil - battled for supremacy for the earth. It was a time of magic and adventure when all men possessed special powers.
The most evil wizard, Narzod, gained the power to enslave all mankind. You are the only remaining honorable wizard with the knowledge to harness all the forces of good to defeat Narzod and destroy his sinister fortress. But Narzod has prepared for your apporach and guards his realm with deadly creatures of darkness, including the Mystic Hurler. Beware, and approach the Fortress of Narzod with great caution.