Help Karn defeat Constructs | The Fire of the Mountain Darksiders 2 Guide

Head towards the arena where Karn is fighting off quite a large group of Construct Warriors and help him out. Don't count on the fact that the Constructs will focus their attention only on the Ancient, so be careful and dodge their attacks whenever you can (especially the ones they charge up for). Keep fighting until there are all eliminated.

The game will automatically initiate a conversation with Karn; try to use up all available topics, because you'll not only learn more about your present venture, but also complete a part of the [Shaman's Craft] side quest and unlock a new optional mission called [Lost and Found].