The Black Figure

Me and my friend created a world that was a theme of a city. After about 45 minutes of building, strange things started to happen. Blocks broke without my friend touching them. Then we saw a black figure, looked like a black shadow. Every time we would look out of the city, we would see it. The kore the blocks broke, the more scared we got. Then, when we looked at the player list, and there were us two, but another player with no rank, no picture, not even a name. It was quite creepy. The scariest part is when my friend started chatting weird messages. We think it was the black figure. These were the messages:

Black Figure: ”svdhsvdhsgdhdbchdcb”

Me: “STOP BLACK FIGURE!”

Black Figure: “no”

Black Figure: “die with the city”