Evil unicorn

This happened on my hardcore Minecraft world 5 days ago.
It was in the middle of the night, I was bored and I couldn't sleep, so played on my 10 months old hardcore world, everything looked fine, until nighttime came. The first thing I noticed is that no mobs spawned even though its clearly nighttime despite me not lighting up my surroundings and I locked the difficulty to hard mode, but I ignored it hoping it was just a glitch. Nothing happened after 5 minutes later
Then when I was exploring, I saw a sign saying do you know the person behind you? and immediately I heard faint footsteps coming from a cave I haven't explored. The scary thing is that cave also happened to be behind me. I slightly suspected that someone was pranking me, but I ignored it. I explored that cave, lit it up, but nothing was there.
Nothing happened after that, until 5 minutes later, when I was heading to my base I noticed something I didn't remember building. It was a small house made out of black glazed terracotta and lit redstone dust surrounding it. I went inside and examined it more. Inside there was nothing but a chest, with a book. saying you should not be here, get out, NOW I a shiver ran down my spine. 
Then I went outside and ran away, but I noticed a sign in the distance saying you got yourself in even more trouble, (my full name) I was shocked, I never publicly shared my full nor real name online. I broke the sign immediately and ran back home. I felt like I was being hunted down by something, and indeed, I was.
Something happened again after 5 minutes, when I noticed a distant forest burning, I went closer, there was not a single block of lava anywhere,. I ran back home, when I noticed my pets had disappeared, I freaked out.
Nothing happened after 20 minutes later, when everything in a 6 block radius turned into black glazed terracotta, the exact same thing that the house was made of. I ran away, fast, but it seemed like it was following me. Then giant spheres of the same block started trapping me everywhere. I kept running, and it stopped, but right when I thought it stopped, something else happened. Red fireballs suddenly shot all over the sky and the whole area caught on fire, then the game crashed.
It turns out, when I was about to exit the black house, I saw a black horse like figure with glowing red eyes staring and watching me, and it was following me this whole time.
The whole Minecraft launcher froze, so I had to manually end the task. When the game relaunched, I immediately deleted the world even though that meant losing everything I worked hard on. But it was for my own safety.
Category:Creepypasta
Category:Entities
Category:Supernatural
Category:Short Pastas