There is a house with skeletons in it just West of the Cyseal West portal.
- Defeat the enemies
- Pick up the Hidden Cellar Key from the floor of the house
- Move the straw mat to reveal a trapdoor, go down
- Move the lid off of the coffin (click and drag it to the floor)
- A ghost will appear and tell you how he was the strongest man in Cyseal during life
- The ghost challenges you to destroy something only he could have broken
- Destroy the sphere he summons to gain XP and a treasure chest