During śrāvaṇa, on a particular day, Pūrṇābhiṣikta śrīvidyōpāsaka worships Mahācaṇḍikā to earn freedom from tāpatraya so as to immerse himself completely in the pursuit of śivaikya as personified by Mahātripurasundarī Parābhaṭṭārikā. The procedure normally adopted for Saptaśatī pārāyaṇa using Navārṇa mantra is described as Laghcaṇḍī by ūrdhvāmnāya Tantra. In the krama for Mahācaṇḍī, the elevation occurs on account of ratnatraya, the three gems or vidyās: Sarvamaṅgalā, Pratyaṅgirā, and Vaiṣṇavī-Aparājitā. Each verse of Saptaśatī is recited along with the above three mantras, one vidyā corresponding to each charitra, in six different patterns.
हेमाभां करुणाभिपूर्णनयनां माणिक्यभूषोज्ज्वलां
द्वात्रिंशद्दलषोडशाष्टदलयुत्पद्मस्थितां सुस्मिताम् |
भक्तानां धनदां वरं च दधतीं वामेन हस्तेन तत्
दक्षेनाभयमातुलुङ्गसुफलं श्रीमङ्गलां भावये ||
Bhagavatī Sarvamaṅgalā presides over the prathama charitra. She is worshiped along with her four śaktis through their mūla mantras: KātyāyanI, Bhadrakālī, Trijaṭā, and Ekanētrā. The samaṣṭi of these four śaktis is Mahākālī.
श्यामाभां च त्रिनेत्रां तां सिंहवक्त्रां चतुर्भुजां
ऊर्ध्वकेशीं च सिंहस्थां चन्द्राङ्कितशिरोरुहाम् |
कपालशूलडमरूनागपाशधरां शुभां
प्रत्यङ्गिरां भजे नित्यं सर्वशत्रुविनाशिनीम् ||
Bhagavatī Pratyaṅgirā presides over the dvitīya charita. She is worshiped along with her śaktis Svayamvarā, Kr̥tyā, śābarī, Dēvasēnā, and ṣaṣṭhī – who collectively represent Mahālakṣmī.
नीलोत्पलनिभां देवीं निद्रामुदितलोचनां
नीलकुञ्चितकेशाग्रां निम्ननाभिवलित्रयाम् |
वराभयकराम्भोजां प्रणतार्तिविनाशिनीं
पीताम्बरवरोपेतां भूषणस्रग्विभूषिताम् |
वरशक्त्याकृतिं सौम्यां परसैन्यप्रभञ्जिनीं
शंखचक्रगदाभीतिरम्यहस्तां त्रिलोचनां
सर्वकामप्रदां देवीं ध्यायेत्तामपराजिताम् ||
Bhagavatī Mahāvidyā Vaiṣṇavī Aparājitā presides over uttama charitra. Her śaktis are Vārtālī, Padmāvatī, Bālā, śyāmalā, and Bagalāmukhī, representing Mahāsarasvatī.
These sixteen śaktis emanating from the left half of Parabhaṭṭārikā through her Daurga-dēha, when propitiated, grant kṣipra-siddhi of Chaṇḍikā to śrīvidyōpāsakas. Based on the phala desired by the pāṭhaka, the correspondence between the charitratraya and the śaktis varies. There is another vidhi for Mahācaṇḍī peculiar to Guhyakālikā but we shall refrain from that discussion here on account of śāstra-maryadā.