Elden Ring Gowryβs quest or task can be triggered in the Caelid area and requires you to find the Unalloyed Gold Needle, a key item that can save Milicent. The Elden Ring Gowryβs Unalloyed Gold Needle and the task you must complete is a bit complicated unless you follow several steps to get the most out of it.
Therefore, below, weβll tell you how to complete Gowryβs Task, find the Elden Ring Unalloyed Gold Needle, and access Gowryβs shop because he is a Sage who can teach you several spells. Furthermore, weβll go over Milicentβs location and how to use Selliaβs Secret key item.
Where To Find Gowryβs Shack
In the video game developed by FromSoftwareΒ for PC, Xbox, and Playstation, Gowryβs Shack is a landmark found just north of Sellia Gateway. You can see it on the map below, and you can access it while riding north from the Southern Aeonia Swamp Bank Site of Grace.

As you ride through the large gate south of the shack, on the right side of the road, youβll see a glowing message on the ground, left by Gowry, asking you to stop by his shack. The shack in question is several steps away from the sign on the road, as you can see in my screenshot.

Now, head to Gowryβs Shack, and inside, youβll find Gowry, an NPC similar to a monk. But in fact, he is a Sorcerer or a Sage. Make sure you approach the NPC and talk to him until he asks you to help him.

Accept Gowryβs request, and heβll tell you about Milicent, a young girl he saved in the past. Unfortunately, Milicent is affected by the rot, and while he canβt save her, he can ease her pain. But for this, he needs the Unalloyed Gold Needle. So your job is to get the said Golden Needle.
Where To Find the Unalloyed Gold Needle
The Elden Ring Unalloyed Gold Needle is west of Gowryβs Shack in Aeonia Swamp, but it is carried by a boss named Commander OβNeil. You can see Commander OβNeilβs location in the game, marked on my map. Before approaching him, make sure you rest at the closest Site of Grace and get ready to face the large boss.

Commander OβNeil is extremely slow, but what makes him so powerful are the mobs he summons as ghosts. Consider focusing on the mobs first, then on the boss. Since youβll be fighting in a large area, you can use your horse, so stay mobile and take out the ghosts the boss summons.
First, heβll summon archers, followed by soldiers; however, you should be able to take him out relatively fast due to his speed. When this happens, heβll drop the Unalloyed Gold Needle and the Commanderβs Standard.

Additionally, youβll activate the Heart of Aeonia Site of Grace. The problem is that the Elden Ring Unalloyed Golden Needle you get from him is broken. At this point, youβll want to return to Gowry and see what he has to say about this.
How To Use Commander OβNeilβs Unalloyed Golden Needle
When you get to the Sage, show him Commander OβNeilβs Needle, and heβll offer you Selliaβs Secret, a key item weβll discuss below.

Now, youβll want to talk to him again, and heβll tell you that he can fix the needle, but he needs time. What you want to do next is rest, but you should do it at the Church of the Plague (northeast of Gowryβs Shack). Inside this church, youβll find Milicent.
If you did not explore the church before finding the quest-giver, you can see Milicentβs location below, but be advised that you have to follow the path north of Sellia City to get there.

Upon resting at the Church of The Plague, return to Gowry, and heβll give you the repaired needle.
How To Save Milicent
With the repaired Unalloyed Needle in your inventory, head back to Milicent in Church of the Plague and give it to her. When you do this, sheβll use it but faint, and now youβll have to wait again. Rest at the Site of Grace in the church and pass the time, then youβll see Milicent waking up. Talk to her, and sheβll give you the Prosthesis-Wearer Heirloom Talisman in my screenshot below.

Additionally, Milicent tells you that she intends to take a journey, which leads to the idea that Gowryβs questline ends here. But itβs not.
How To Access Sage Gowryβs Shop
After you heal Milicent, get to a Site of Grace close to Gowryβs Shack and rest, then head back to the hut to find Milicent looking for the old Sage. Talk to her, and sheβll tell you that she wanted to thank him before leaving.
Now, go back to the Site of Grace and rest one last time before returning to Gowryβs Shack. This time around, youβll find Gowry, not Milicent. Talk to him, and youβll be able to buy several spells from the Old Sorcerer.

One last thing worth outlining is how to use Selliaβs Secret you get from Gowry. Basically, this note tells you that you have to light three candles to break the seals on the towers around Sellia City.
Each tower has a candle on top, and by lighting them, youβll remove the barriers on the three towers, gaining access to even more items you may need for the journey ahead. Thatβs everything you need to know about the Elden Ring Gowryβs quest and the Unalloyed Gold Needle you need to use to save Milicent.