Character design - Giantsledge Sloth

Character design of a creature done for the videogame The Hunting of Shuma.
Here is the final render, with some sketches I did to find the final concept.
The subject description was the following:
"The Giant of Giantsledge is an enormous prehistoric sloth, though frightening and nearly unrecognizable in its shrouded shadowy form and haunting skull-like mask of a face. He is partially covered in plant vines. He moves with a slow, lumbering gesture and wields a giant sledgehammer also partially covered in plant vines. This creature is a high level/high-tier challenge that is narratively representative of the long forgotten history and eradicated ancient cultures of Shuma's world."