Structures: Herobrine Spawners, 3x3 pyramids,deep holes (make it so if you fall you wont be able to get back up),Redstone torches Leading to a death trap?
You should watch herobrine encounters on youtube even if there fake.. you can get some ideas there
Ok!
He is right! ...... or Paranormal hha.... like in herobrine animation ..... hehe ^^ make it more spooky