Blaidd the Half-Wolf is an NPC that's described as Ranni's blade in Elden Ring. The Witch sends him on a mission to find Nokron's hidden treasure. Unfortunately, Blaidd doesn't know where the entrance is, and since Nokron is an underground area, he suggests that Tarnished meet him in the Siofra River.
Siofra River is a large underground area in Elden Ring. Players need to go through a lot in order to find Blaidd. He can be found in the deepest part of the Siofra River. Even after Tarnished complete the task and talk to Seluvis, Blaidd will still stand in the same spot. He only moves when the quest to defeat Starscourge Radahn starts, where Blaidd will move to Redmane Castle.
Elden Ring: How to Beat Starscourge Radahn
Blaidd is standing near a cliff in Siofra River (near the Hallowhorn Grounds). To reach him, players need to use the Siofra River Well to arrive at the underground area.
Upon accepting to serve Ranni the Witch, she'll ask Tarnished to speak with three people on the first floor, one of them is Blaidd. The Half-Wolf will be standing near a wall in his spectral form. He then tells players that he's heading to Siofra River to search for Nokron, the Eternal City.
Tarnished have to travel to Mistwood Outskirts Site of Lost Grace in the far east of Limgrave. Upon arriving, summon Torrent and head east to the Erdtree. There's a round building near the tree, which is the Siofra River Well. Using the lift inside will take players down to Siofra River.
Light up the Elden Ring Site of Lost Grace and sprint north. In the distance, there's a big archway surrounded by destroyed pillars. Go through the entrance and climb the stairs to the left.
Keep climbing until a giant waterfall is in sight. There should be a small entrance
Read more on gamerant.com