Vijaya or Vijaya Dhanush was the divine bow of Karna, one of the greatest hero of the Hindu epic, Mahabharata.As the Sanskrit name Vijaya means Victory, this bow is said to give sure victory to the possessor.The bow was created by Vishvakarman, the royal architect of gods or deva's as per the order of Lord Shiva for the purpose of killing demons called Tripurasuras. Lord Shiva defeated demons by using arrows fired from Vijaya bow.Later Lord Shiva gifted this bow to Lord Indra, the ruler of heaven.Lord Indra gifted this bow to Parasurama as per the order of Lord Siva for eliminating all Kshatriya's of the world and later Parasuram gave Vijaya to his student Karna,who already had terriffic skill, making him virtually invincible. Lord Krishna devised a plan to kill karna, and asked Arjuna to kill Karna when he was weaponless trying to lift his sunken chariot wheel, even though it was highly prohibited or against the rules of engagements in war, to kill an unarmed warrior.