This story is fake. Do not believe or you will be banned.Edit
The Hill Beast is a large mob, said to spawn in Hilly Areas. It is said to look like a Large Iron Golem. If it is real, it might be a glitch of that mob.
Write your own sighting under this text if you have one.
16 February 2018, Hello! My name is LuckyGuy2017, also known by my real name Nathan. And I'm gonna tell you my sighting of the Hill Beast:
I was playing Minecraft 1.7.4 on a computer running Windows 2000 Build 1946 with a 233MHz Pentium. I had all things Diamond; Diamond Sword, Axe, Shovel, Stone Hoe (don't waste your diamonds on a hoe), Helmet, Chestplate, Leggings and Boots. I decided to go to an Extreme Hills biome for some coal.