Grim Dawn: Definitive Edition

Ravager, the Wendigo Spirit (also known as Ravager of Flesh) is a Celestial boss found in Barrowholm. This is possible at the end of the Barrowholm questline. After finishing the quest called "The Feast," you'll get another quest named "Cast off the Flesh." You'll have to select one of three NPCs to become the Ravager. It doesn't matter who you chose.

When the Ravager spawns you'll be able to speak to them. I believe you have a few set of dialogue options to be able to fight him. If you have beaten the Avatar of Mogdrogen, then you can chose these options:

• Can I ask you some questions?

• You do not impress me, I've faced a God and won.

If you haven't beaten the Avatar of Mogdrogen, then I believe you can chose these options to fight him (I haven't tested but based on watching a video):

• Can I ask you some questions?

• Can I receive your gift?

• I won't just stand here and take insults from you.

You probably should fight the Avatar of Mogdrogen first, because this boss is even harder. He deals massive bleed damage and I almost died a few times fighting him on Normal with a level 100 in end game gear.

Video guide of the fight: