Cundī dhāraṇī or mantra also first appeared from the Kāraṇḍavyūhasūtra: namaḥ saptānāṃ samyaksaṃbuddha koṭīnāṃ tadyathā oṃ cale cule cunde svāhā Baṭuka Bhairava could be the youthful type of Kāla Bhairava, a specific and vital type, specifically in Tantra and Śrīvidyā. This is why, Om is regarded as a foundational thought https://www.youtube.com/@AacharyaGoldieMadan/