Vijaya or Vijaya Dhanush ('Victory' in Sanskrit) was the divine bow of Karna. This bow is said to give sure victory to the possessor. Parasurama gave Vijaya to his student Karna, who already had terrific 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.