The floating cobblestone

One day in an old version in Minecraft pocket edition, I decided to switch my difficulty to hostile instead of peaceful. (then there were two difficulties) Zombies started spawning in my mines so i switched back to peaceful. when I came back, my secondary house was cloned, there were huge cracks in the land going straight to the void, and creepiest of all, Floating cobblestone. I was never brave enough to go to the cobblestone and see what was there. I asked my friend, Hampy2000 what the cobblestone meant, he said it meant a boss was coming, like Herobrine. When i ventured into the Ravines, I found one diamond vein. I crafted a sword and kept one diamond. I then stopped playing for a one-year interval. By then, I had computer version, granite was in pocket edition, and My username was finally changed to Squiddestroyer2. When i looked around my house and storage shed, my diamond sword was gone and i had to make do with a stone one.

Later, Herobrine came to me and started talking to me.

 Hello Squiddestroyer2, I've been waiting a long time for you.

 What do you want with me?!

 Relax, I am not the threat, I came to warn you.

 Warn me about what?

 Them.

 Them?

 Who do you think built the pillars? Me?

 Erm... well... yes...

 No, I build Pyramids made of obsidian.

 Oh. Right.

 Here is a set of iron armor and an iron sword. It all help in the final battle of this world.

 Are you going to help me fight them?

 No, I am powerless against them. You must go alone.

 What do they look like?

 Their leader looks like a villager, they look like cobblestone creatures.

 Thanks Herobrine!

After that, Herobrine left and I went to go see the pillars. They were now on the ground and looked like cobblestone creatures, like Herobrine had said. I could see their leader on a cobblestone pillar.

My sword didn't do any damage to the cobblestone monsters, so I switched to a pickaxe, which worked well. After finishing them, I moved on to the leader. He had the powers of an evoker, but looked like a librarian villager. When I had finished, my tablet crashed and I restarted it. When I got back on The leader dropped a paper saying he would be back. I said in the chat "Screw you" and deleted the world. Remember, If you see cobblestone pillars floating over your world, delete the world ASAP.