For those who don’t know about Sisyphus, here is the king’s Wikipedia entry:
In Greek mythology Sisyphus or Sisyphos was the king of Ephyra. He was punished for his self-aggrandizing craftiness and deceitfulness by being forced to roll an immense boulder up a hill only for it to roll down when it nears the top, repeating this action for eternity.
[Source: Skeleton Claw | Like “Skeleton Claw” on Facebook | Follow “Skeleton Claw” on Twitter]