Thor: The Dark World
|Game||Thor: The Dark World - The Official Game|
|Comic||Thor: The Dark World Prelude|
The Jotunheim Beast is an animal native to Jotunheim. It is massive in size and can run at incredible speeds. It can be frozen solid for long periods of time.
It was soon killed by Thor, who propelled himself through its head.
One of these beasts was disturbed by Thor and Malekith's battle through the portals and traveled to London where it rampaged around the city eating Dark Elves.  It eventually started chasing birds.