Shakuni became his maternal uncle and Karna his great friend. Many other kings were born on Earth for helping him in the work of destruction.
शकुनिर्मातुलश्चैव कर्णश्च परमः सखा॥ समुत्पन्ना विनाशार्थं पृथिव्यां सहिता नृपाः।