I decided I wanted to make a new Minecraft world and build a city in survival mode. But when I got into the world, I saw a neatherrack cube. I decided to mine through. When I got in, I saw a ender chest and it had a book & quill. When I read the book, it said look behind you. So, I looked behind me and I saw a black figure with a green creeper face. I walked up to it and it crashed the game. After a few hours, I deleted the world and I will never play on the same seed again!
Signs of the black Creeper: