Prison Warden:
Enter the dungeon prison and slay the prisoners.

Wipe out all 3 gangs to eradicate the monsters' entire organization in the dungeon.
When you defeat the leader of the last gang, bring me a Fragment of the Dungeon Leader Mark and I will pay you with a Knight's Epaulette.
If you take it to a Court Wizard, he will exchange it for the castle's clan supply for you.
Ah, one last thing...
The leaders of the monsters are Beautiful Atrielle, Nagen the Tomboy and Jax the Destroyer.
I can grant you access to the dungeon right now.
Good luck!
"What are the monsters in the dungeon like?"