This quest is not available in game.
Defeat Ty'thar by purchasing his challenge card and challenging him in the Brawler's Guild.
You've earned the right to purchase a challenge card, and that card belongs to a troll named Ty'thar.
Ty'thar has a very distinct fighting style, and as part of his agreement with the Brawler's Guild, you have to follow his rules:
- Face-to-face fist fighting. No running around.
- Three knockdowns wins the fight.