How to complete the Blaidd questline in Elden Ring

gamepur.com:

The initial Blaidd questline is one of many in Elden Ring where you can look away for a second and miss it. It’s definitely worth seeking out, though, as it can turn a potentially tricky optional boss fight into an absolute breeze, and there are some potentially useful rewards if you can see it through.

In order to trigger it, you’ll need to have navigated the early stages where you first meet the Merchant Kale in the Church of Elleh on your first steps into Limgrave. Assuming that’s a given, a trip to eastern Limgrave to find the Mistwood Ruins is in order. As an aside, at the ruins, you’ll find a large bear sleeping over the entrance to a small cellar with an Ax Talisman inside, which gives a 10% boost to your charge attacks (you can avoid waking the bear by sneaking in and then fast traveling to safety).

With the location now on your map, head back to talk with Kale and he’ll drop in a mention of Blaidd and how the two could be great friends, giving up a free Finger Snap gesture to help you win him over. With this in hand, head back to the ruins and listen out for the sound of a howling wolf. That’s your cue to use the gesture and Blaidd, also known as the Half-Wolf, will appear outside the northern section of the crumbled building.

After a quick chat, Blaidd will tell you about someone called Darriwil who could do with being taught a rather lethal lesson. To find him you’ll have to head south to the Forlorn Hound Evergaol, located in the hills just before the bridge leading to the southern island. As with all gaols, you’ll need to initiate the center circle to head inside and be ready for a fight. Well, almost…

The bad news is that his full name is Bloodhound Knight