The Vajradhara Cala is an enemy in Crisis Core -Final Fantasy VII-.
Beware of its powerful Tomahawk Boomerang attack. Equip HP Up, VIT Up, and ATK Up materia, and try to keep Zack's HP above 2,000 all the times. Try to get behind the giant beast, and attack it with sword slashes for critical hits and extra damage.
Vajradhara is the ultimate primordial Buddha, or Adi Buddha, according to the Gelug and Kagyu schools of Tibetan Buddhism. Achieving the 'state of Vajradhara' is synonymous with complete realisation.