Diablo 4: Vessel of Hatredintroduces the Mercenary system, allowing you to fight alongside four different NPCs, each with their own builds to set up. You will unlock your first Mercenary through the Vessel of Hatred campaign, but the subsequent three need to be unlocked through specific quests.

Subo, the Bounty Hunter, has several skills that center around trapping enemies and dealing high damage to them. Below, we’ll take a look at how to start and complete the A Feather on the Scale quest to unlock Subo as a Mercenary companion.

The player reading the Muddy Letter in the Den to start the A Feather on the Scale quest.

How To Start A Feather On The Scale

You can begin this quest shortlyafter reaching the Den for the first timeand unlockingRaheiras a Mercenary.

After doing that, you can start’A Feather on the Scale’by interacting with theMuddy Letternear the Stash in the Den.

The player talking to Subo in the Toxic Fens.

How To Complete A Feather On The Scale

First, speak to Raheir and show him the helmet that came with the letter, then head to theToxic Fens in Hawezarto begin your search for Subo. you may use theVyeresz Waypointif you have it unlocked, otherwise, theBackwater Waypointis the second closest.

Either way, head to the Toxic Fens. When you get close enough to the quest objective, it will turn into an area marker; search around here for Subo, who should be locatednear the top right of the area, to the right of thenearby Lilith Statue.

The player talking to Subo outside the Windswept Altar dungeon.

Talk to Subo to learn about his plan, then enter theSmuggler’s Bunkerimmediately to the left. Inside, find and talk to Subo, then defend him fromthree waves of Banditsas he interrogates his captive. Speak with Subo again, then head to theWindswept Altarfor the next part of the quest.

From the Smuggler’s Bunker, travel to thewest towards the Windswept Altar, then talk to Subo and listen to his plan. Then, head inside the Windswept Altar.

The player, Subo, and Raheir fighting Avashtha, the final boss of the Windswept Altar dungeon.

In this dungeon,fight off the groups of Bandit enemiesas you proceed towards the depths. As far as dungeons go, this one is fairly straightforward. When you reach the deepest point, approach the boss then watch the cutscene.

Now fight off the final boss of the Windswept Altar, Avashtha, Malformed Serpent. This enemy firesspiraling globs of poisonand createsbloody clones of itselfthat deal damage in lines to their front. Watch out for the danger indicators and use yourdodge and mobility skillsto avoid taking damage.

Once the boss is dead,return to the entrance of the dungeon, then talk to Subo again to complete the quest. Now, when youreturn to the Den, you’ll have the option of bringing along Subo as your Mercenary.