When your hero gets to the town of Pinesville he will encounter a villager named Ragnar. To reverse Ragnar's curse he bestowed upon himself, the following is the correct order the counter spells are to be entered:
1. Stone Belt 2. Crystal Dome 3. Curse of Oblivion 4. Cliff Spell 5. Sun Ray Spell
Once your hero uncurses Ragnar, he will offer to join your party. If your hero has enough Charisma to allow him into your party, accept his offer. He will fight by your side as a token of gratitude.