Sludgefist

Sludgefist is a single phase "patchwerk" style encounter in which the raid needs to defeat this hulking monstrosity before he removes all four pillars in the room and then slams into a wall with his Hateful Gaze. This fight requires on the fly coordination, as the boss will tether random players together with Chain Link that will likely kill the players if broken. The fight takes place in the same space as the Shriekwing encounter.

Sludgefist is the first boss in the final Upper Spire wing. 

Sludgefist Quick Tips in Castle Nathria