Thunderlord
From Vintage Story Wiki
Thunderlord is a seemingly mechanical creature of ginormous scale and it seems to get even bigger when your temporal stability begins to decline. The name Thunderlord was first found in the files of the game and his design sits with the name as there are 2 branch like struts going upward from each of his 4 legs and a few more from his neck.
Community
Although not much is know about this mysterious creature many have begin to call him "Dave" or "Barry".
History
The Thunderlord seems to have been added into the game around version 1.18. and has been scaring new players as the gigantic monster he is.