In the Kālikā Purāṇa (Kalika Purana), it was said that Mahādevī Durgā (Mahadevi Durga) killed Mahiṣāsura (Mahishasura) thrice in three different manifestations. In the Ādi Sriṣti (Adi Srishti) or in the beginning of creation, she killed Mahiṣāsura (Mahishasura) as Ugracaṇḍā (Ugracanda). In the second creation, Mahiṣāsura (Mahishasura) was killed by her in the manifestation of Bhadrakālī (Bhadrakali). And finally she destroyed Mahiṣāsura (Mahishasura) as Durgā (Durga). When Devī (Devi) manifested herself in the epitome of Ugracaṇḍā (Ugracanda), it was noticed that she had two more hands than the sexteen hands of Bhdrakālī (Bhadrakali). So Ugracaṇḍā (Ugracanda) had total eighteen hands.
As a Devī (Devi) of sixteen hands, Bhdrakālī (Bhadrakali) had the following weapons in her right hands- śūla (sula or spear), khaṛga (kharga or a kind of sword), śaṁkha (samkha or conch), cakra (circle), vāṇa (vana or arrow), śakti (sakti or a kind of powerful weapon), vajra (lightening) and daṇḍa (danda or stick). In her left hands, she held the following weapons- khetaka or a kind of shield, carma or a kind of a buckler, cāpa (capa) or a kind of piston, pāśa (Pasa or an ancient Inian missile by throwing which an adversary could be fastened), aṇkuśa (ankusa or an iron rod for striking with), ghaṇtā (ghanta or bell), paraśu (parasu or a battle-axe) and muṣala (mushala or a mallet). If the two hands were joined with the sixteen hands of Bhdrakālī (Bhadrakali), the epitome of Ugracaṇḍā (Ugracanda) was created with eighteen hands. Ugracaṇḍā (Ugracanda) held two extra things in these two extra hands. In the last of right hands, she held a gadā (gada or a mace). The last of her left hands held a pot full of wine. The other weapons of Ugracaṇḍā (Ugracanda) were same as that of Bhdrakālī (Bhadrakali). The head of Ugracaṇḍā (Ugracanda) was adorned with a muṇḍamālā (mundamala or a string or wreath of severed human heads)-

Yā mūrti ṣoḍaśabhujā Bhadrakālīti viśrutā.
Tathaiva mūrtiṃ vāhubhyāmaparābhyāṇca vibhratī.
Daṣiṇādho gadāṃ vāmapāṇinā pānapātrakaṃ.
Surāpūrṇaṇca śirasā muṇḍamālāṃ vileśayaṃ.

The complexion of Ugracaṇḍā (Ugracanda) was as black as collyrium or lamp-black. She looked ferocious. She was seated on a lion. Her eyes were as red as blood. She was huge in her physique. She had eighteen hands.

Ugracaṇḍā (Ugracanda) was worshiped following the norm of worshiping Durgā (Durga). She was one of the eight Yoginīs (Yoginis or companions) of Devī Durgā (Devi Durga). Again Umā (Uma) or Durgā (Durga) was a part of the Yoginīs (Yoginis or companions) of Ugracaṇḍā (Ugracanda). [See Aṣtayoginī (Ashtayogini)]