Stalagnarok

This NPC resides on Siren Isle, in a deep cave with an initially sealed entrance. To access this enemy, you need to use the Siren Isle Command Map and perform excavations for the "Shuddering Hollow" event (you need to contribute resources to reach 100% progress to activate it).

After activating the event, head to the location at the coordinates: /way 43.41, 56.52. There, you will encounter a wall, but a timer indicator will appear. Once the timer finishes, the barrier will disappear, allowing you to enter the cave where this monster resides. Descend and begin the fight with this underground creature.

Respawn: 5-10 minutes (verified in WoW TWW 11.0.7).

Interesting Fact:

In this cave, you can find a decorative transmog item called Iron Mining Pick.