Ketheric's Invulnerability

[peacefighter]

In the final battle with Ketheric at the Mind Flayer Colony, I discovered that he is invulnerable. How come? I saved the Nightsong. I killed a nearby Mind Flayer in hopes that it will remove his invulnerability, but this did not help. I tried pushing him into the green abyss, but he cannot be moved.

Questions:
1. How do I remove his invulnerability?
2. How do I beat him if I can't remove his invulnerability?

Thanks in advance for your input.

[Rin Palora]

The Nightsong should be on another platform on the same side as the mind flayer. She is once again feeding his invulnerability, that's why the tentacles took her. You need to free her again: send somebody over there to use an action to interact with her. That will remove his invulnerability and let you do damage.

[peacefighter]

Thank you very much for your speedy reply. I'll check it out.

[peacefighter]

SUPPLEMENT:
Thanks again, //Rin Palora//. My hero came to the aid of Dame Aylin, and immediately, I noticed that Ketheric is no longer invulnerable.