The mythological figure known for their impossible 12 tasks, including slaying the Nemean Lion, is Heracles, also known as Hercules. His tasks, known as the Labors of Heracles, were assigned as penance and tested his strength, bravery, and intellect. Each labor symbolizes different aspects of the human condition, illustrating themes of redemption, resilience, and heroism. Heracles’ journey emphasizes the notion that greatness often arises through arduous trials and personal growth.