he wanted revenge. Teaching the Kuru Princes Drona along with Kripa was brought by Bhishma for the education of the Kuru princes . As a reward, Drona gave Arjuna mantras to invoke the super-powerful divine weapon of Brahma known as Brahmashirshastra, but told Arjuna not to use this invincible weapon against any mortal. When Arjun, inspired by his brother Bhima's nocturnal eating, mastered archery in absolute darkness, Drona was moved. Drona was greatly impressed by Arjuna's concentration, determination, and drive, and promised him that he would become the greatest archer on earth. Drona gave Arjuna the special knowledge of the Dhanurveda due to his capability and zeal to learn the new things. Education in Archery of the Kauravas and Reward Ekalavya Ekalavya, the son of a Nishadha chief, approached Dronacharya seeking his instruction. But since his father was a general under Jarasandh, the ruler of Magadha (an enemy state), Dronacharya refused to train him alongside Kauravas and Panadavas. Undeterred, Ekalavya began study and practice by himself, having fashioned a clay idol of Dronacharya's to watch over his training. Solely by his determination, Ekalavya became an archer of exceptional skill. One day, Ekalavya's focus in training was disturbed by the barking of a dog belonging to the Kuru princes. Ekalavya fired arrows that filled up the dog's mouth without spilling blood or causing injury to the dog. The Kuru princes were amazed by the trick and looked for the archer when they saw Ekalavya, who introduced himself as a pupil of Drona's. This made Arjuna amused and quite sad about Ekalavya's archery skills as he said that he learnt indirectly from the same guru Drona that Arjuna was learning. Drona was in a tangle: on the one hand, he greatly admired Ekalavya's skill and dedication; on the other hand, Ekalavya had indeed been training as his pupil without his consent, albeit being guided only by his idol. To resolve the matter, Drona accepted Ekalavya as his student, but demanded the thumb on his dominant hand as gurudakshina, or teacher's payment, in order to limit his abilities and further growth in archery, thus pacifying Arjuna. Ekalavya, being an exemplary disciple, immediately cut off his thumb and presented it at Drona's feet. Moved by Ekalavya's sacrifice, Drona blessed him to attain mastery even without his thumb. Demonstration by the pupils Dhritarashtra approved the demonstration of weapon-game by the princes. An arena was prepared.