Shakuni

Shakuni was the son of king of Gandhara - Subala. He was the brother of Gandhari, and thus the brother-in-law of Dhritarashtra and the the maternal uncle of Duryodhana. Vrishaka, Achala and others were his brothers.

On the 12th day of war

Beholding their brave and unretreating Vrishaka and Achala thus slain by Arjuna, Shakuni , conversant with a hundred different kinds of illusions, seeing his brothers slain, created illusions for confounding the two Krishnas. Then clubs, and iron balls, and rocks and Shataghnis and darts, and maces, and spiked bludgeons, and scimitars, and lances, mallets, axes, and Kampanas, and swords, and nails, and short clubs, and battle-axes, and razors, and arrows with sharp broad heads, and Nalikas, and calf-tooth headed shafts, and arrows having bony heads and discs and snake-headed shafts, and spears, and diverse other kinds of weapons, fell upon Arjuna from all sides. Asses, and camels, and buffaloes, and tigers, and lions, and deer, and leopards, and bears, and wolves and vultures, and monkeys, and various reptiles, and diverse cannibals, and swarms of crows, all hungry, and excited with rage, ran towards Arjuna.

Then Dhananjaya, the son of Kunti, that hero conversant with celestial weapons, shooting clouds of arrows, assailed them all. Assailed by that hero with those excellent and strong shafts, they uttered loud cries and fell down deprived of life. Then a thick darkness appeared and covered Arjuna's car, and from within that gloom harsh voices rebuked Arjuna. The latter, however, by means of the weapons called Jyotishka, dispelled that thick and awful darkness. When that darkness was dispelled frightful waves of water appeared. For drying up those waters, Arjuna applied the weapon called Aditya. And in consequence of that weapon, the waters were almost dried up. These diverse illusions, repeatedly created by Saubala, Arjuna destroyed speedily by means of the force of his weapons, laughing the while. Upon all his illusions being destroyed, afflicted with Arjuna's shafts and unmanned by fear, Shakuni fled away, aided by his fleet, steeds, like a vulgar wretch.