Here's how I believe the brute wyvern would look. It would be MUCH more stout and not coated in scales, however it would have plate-like osteoderms on its back and head for rivaling with competition (5/5)

It would definetly be a lot smaller than it's currently shown in the games, as having such a large therapod body plan would not be sustainable by evolutionary standards (4/5)

It would have osteoderms more similar to the skin of an elephant, with a thinner head and, given its affinity for Aleroths, which are just giant ants, we can look to things like the echidna for mouth shape. (3/5)

Given its diet and how it needs to roll in mud to cool off, it should look more like a synapsid, the family of ancient mammalian-like reptiles during the era of the Triassic
I'm looking at modern day mammals and I'm realizing the modern day equivalent of Barroth would not be pretty (2/5)