Betrayed by the cult

Introduction

First things first, thank you for getting my bones out of the waters. I am certainly missing a couple parts, but I'll survive ... ha! Well you must certainly be asking what has caused me to come back to life? Concretely, there is a lot of corrupted therianic energy around here, so I imagine I am a manifestation of that. Ideologically, I was betrayed by a colleague from the cult of the Behemoth but I don't know his name. I suppose I have come back to satiate my vengeance. First of all we must discover his identity and get his confession. Evidently, my aggressor won't trust a non-member but if you find my signet, you will certainly succeed in passing for a member of our religion. My medallion should be found somewhere nearby, search the sector and come back to see me when you have it in hand.

Cunclusion

My little medallion, all rusty, all rusty My little medallion all rusty, happily ... Eh .. Sorry its a song from my childhood ... Thank you! Keep it, you will need it to find my assassin.