The mouth of Hibernal Cavern is located in the Valley of Ancient Winters, between Brunnhildar Village and Dun Niffelem. It is infested with Ravenous Jormungar.
Phasing
Initial state
Initially, this cave is inhabited by jormungar and living (and dead) Icemaw bears.
(unknown)
The living bears are gone, but Oozes have joined the jormungar.