These are two of my favorite creations.
I made them ages ago for a project that, sadly fell through.
The first animal, is a large, bison like beast with a “mask”. The mask is a part of its skull, it acts as armor. These titans grew to be massive, and were worshiped by the natives as gods of power and majesty.

The second, is a monster named the Ra-Tekka. It’s a huge, powerful and ruthless monster, that hunt the Bison. They grow to a pretty standard size, about as large as a Giganotosaurus, but hefting more bulk, and deadlier weapons. They were seen as demons, and to the natives, if a Tekka took interest in your villiage, you’d beat move to a safer place, as a Tekka’s interest means you’re villiage is cursed, and the villiage sons will die before their first blooding