Hercules or herculean or Hercules' club.
Hercules, in Greek Heracles, was the greatest hero in the ancient world, who wore a lion skin and brandished a club. He achieved countless remarkable exploits, and is most famous for twelve canonical labors. To describe someone as herculean is to liken him to Hercules in strength and stature. Any effort that is herculean requires a tremendous exertion or spirit of heroic endurance. The Hercules is a constellation in the northern hemisphere near Lyra and Corona Borealis. A shrub, indigenous to the Southeastern United States and characterized by prickly leaves and large clusters of white blossoms, is known as Hercules' club.