Terror of the Bestiary

Defeat Specimen, discover the source of the mutation, and report to Sergey Dozorin.

You know, I remember what you told about your vision... And I come to realize that what you saw was the heart of the mutation. Though you probably don't remember that.
There is a dead zone in the far end of the Bestiary. Animals and birds keep away from it. My dog refuses to go there, and honestly, I don't really want to myself. But I'm afraid I have to...
There must be a cave in the depth of the complex. Whatever hides in there, it conceals the final answers to our questions. You will have to fight the thing that has destroyed the whole Bestiary. I've already called for the expedition technicians - they are bringing all the necessary equipment - hovering platforms, turrets, explosives... So you will also have to guard the staff and the inventory!
Just try not to die in there, alright? I'm sure we will need you help in the future. Good luck!

The expedition members call your next enemy the "terror of the Bestiary"...

A crystal? A single stone deranged all the animals in the area and turned them into monsters? Unbelievable!
Well, I will leave this mystery to someone else. Me and Baxter have better things to do. Drink some Prowls' brew, for instance!
You are good indeed! I've heard a lot about you. Now I am wondering who was more of a beast - those defeated creatures... or you?
Never mind. It's time to have a drink!