I only make 1 homebrew adventure. The party was a group of mercenary.
The main villain was a dwarf fighter level 9. Originally he was a military lieutenant general of Alamach kingdom and the main quest giver to the party. The quest was to rescue a human princess whom he had crush with. The princess was demanded by Gorvian kingdom as truce between the two kingdoms.
After the party save the princess from the bandits, the dwarf met the princess and confess his feeling to her. Unfortunately the princess rejected him. She told him that she had to married the neighbourhood prince in order to maintain the relationship between the two nations.
The dwarf then grew a grudge to the princess. He then ordered the party to bring the princess to the castle garden. He said that he wanted to met the princess once more before she went to her wedding. Unknown to the party, the dwarf ambushed and killed the princess with his dwarven elites. He also tried to slay the party so the murder would not be revealed to the king.
At last he was killed and the tragedy was exposed to the king. The marriage was canceled and so the peace between Alamach and Gorvian.
The party then strive to my next 'never released' adventure :(