Now you have to live the rest of your life knowing you're going to die someday and disappear forever.
The Griever appeared in both 2009 and 2014 movie called The Maze Runner. Its a spider-like cyborg created by a group of scientists known as the WICKED. It has a robotic tail that'll provide a stinging sensation that'll instantly kill a Glader.
It can be seen during the final battle.