The Runic Golem

You have found a Runic Golem which you'll have to activate if you wish to have any chance of survival within Amgarrak Thaig.

Acquisition
Approach the inactive Runic Golem in one of the side-chambers in the cave system outside Amgarrak Thaig.

Walkthrough
After interacting with the Golem, Jerrik will muse that there must be a control rod nearby. Upon leaving the Golem's chamber, the mist will have shifted once again, revealing another chamber with the control rod and a Rune Anvil in it. After battling 4 Shrieks, pick up the control rod, return to the Golem and activate it.

Result
The Runic Golem re-activates and becomes an incredibly hardy companion.