Discy
Discies are enemies with a massive circular saw cutting through their heads. They wander aimlessly around the room. When a Discy dies, it will launch a Dangerous Disc towards Isaac, pushing itself backward a short distance and transforming into a Nobody.
Nobody
Nobodies are pale variants of 
Faceless that behave similarly, wandering around aimlessly and only chasing Isaac after taking damage or if he gets too close. Unlike their counterparts they will only attack while chasing Isaac, periodically firing an arcing volley of bloody projectiles towards him as they move.
While Nobody can be spawned by Discy, it can also commonly appear on their own in rooms.
Dangerous Disc
Dangerous Discs are large invulnerable saws that travel in one direction until they come into contact with a wall or obstacle. Similar to 
Guts, it will stick to, and quickly roll along the sides of walls and obstacles. Dangerous Discs deal a full heart of contact damage.
Dangerous Discs spawned by Nobodies will only disappear once the room is exited. However, they can also appear on their own in rooms, where they will remain even if the room is left and re-entered.
Trivia
- Dangerous Disc was inspired by the game DISC ROOM.
- The sounds made by Dangerous Discs are from Super Meat Boy.
