The (old) watcher.
A giant amalgam of watcher hands, saws, and lights made into a hivemind like robot.
The watcher will walk around searching for moving players on a red light, but on a green light it will shut down for 10 seconds, giving players time to escape.
Once a watcher spots a moving player, it will begin to run on its arms towards said player, killing other people in its way.
Once they are caught, it will pick them up and use their saw to rip them apart.
After said attack, it will go back to normal.
Thoughts?