This quest is a follow-up to "Rebellion or Revolution" and it is the final quest of the second chapter of the main storyline. Shakatu wants you to eliminate Hornsplitter, who is the source of all the turmoil.
Find and defeat the Hornsplitter to resolve the matter.
Rewards: 10 Silver, Sword of the Lord, Iron Ore x7, Copper Ore x2, Hernand Refinement Token x1.

1. Defeat Hornsplitter
Hornsplitter is located within the Goldleaf Guildhouse, a large camp surrounded by a canvas fence. You can reach it through the main entrance, but be prepared to fight numerous guards along the way. This approach has its perks, as you'll collect plenty of loot from defeated enemies - such as food, which will come in handy during the boss fight.

Alternatively, you can sneak undetected along the cliffside, destroy one of the canvas walls, and slip into the camp. Once you enter the grounds, a cutscene will trigger in which Hornsplitter greets you, and the battle will begin shortly after.

Hornsplitter has only one health bar, but he is a much tougher opponent than the first main story boss - Matthias. He is fast, utilizing ranged attacks or attempting to strike you with gap-closing lunges. While some of his attacks can be blocked, one is unblockable and must be dodged / avoided.

The fight with Hornsplitter will also provide an opportunity to learn a new skill - Evasive Roll.

Eventually, Hornsplitter will fall and Shakatu will take control of the Goldleaf Merchant Guild. You'll be rewarded with a Seal of Greed - Goldleaf Merchant Guild - Trade Goods Profit +20.0%(2 hr).
You felled Hornsplitter in the middle of the Goldleaf headquarters. Without a moment's hesitation, Shakatu ascended the blood-soaked throne. Watching him deliver a speech to his fellow goblins that seemed far too well-rehearsed left you conflicted about his true intentions.