Gigantaur

Finn saw a giant head arising from the ground. At first thought, it appeared to be some kind of large sculpture but with time, when the full body came on display, Finn was now able to see just what he was up against. The being in question appeared to be in a semisolid form and only took the shape and appearance of a Hard Rock when it was fully out from the ground.

Finn had never seen anything like that before. Standing at about eight feet, the giant stone being possessed strange features that were hard to comprehend. Taking the appearance of a stallion, the being stood with four horse legs and a horse back and tail. But ordinarily, horses weren't as muscular as he was nor did they have their upper body parts carved in the shape of a man.