Nothingiswatching is a pitch-black rectangle reminiscent of a censor bar, standing at about 5 blocks tall. It is a 2D sprite that always faces the player.

Nothingiswatching will appear on the ground and begin slowly approaching the player, always facing them. When it just appears, it will play an eerie noise and whitenoise.ogg.
If the player comes within a 20 block radius of Nothingiswatching while looking at it, one of the following will happen:
Nothingiswatching will chase the player and play nullchase.ogg. During this, the player's camera will be locked on it.
Nothingiswatching will break most blocks it runs into, with the exception of some natural blocks such as dirt and stone.
Every tick there is a 0.01% chance that Nothingiswatching will **teleport **right next to the player.
The player's screen will be covered by flashing black artifacts, significantly obscuring the player's vision.
Getting within a 5 block radius of Nothingiswatching will result in it playing nullchase.ogg and instantly kill the player.
It will disappear after 40 seconds.