Ksvir the Forgotten

This opponent resides in a secret magical dungeon on the Siren Isle, but it can only be encountered in the Storm Mode.

Head to the upper part of the island. At the coordinates: /way 43.97, 23.22, you will find a hole in the ground — this is the entrance to the cave. Descend, and you will see a magical plaque in front of you. Click on it, and your character will be teleported to the secret dungeon. Once inside, go straight until you reach a stone door. Open it and continue forward. At the very end of the room, at the bottom, you will encounter this ruthless warrior at the coordinates: /way 37.94, 76.52 (coordinates are valid only inside the dungeon).

Respawn: 5–10 minutes (verified in WoW TWW, patch 11.0.7).