Cundī dhāraṇī or mantra also to start with appeared during the Kāraṇḍavyūhasūtra: namaḥ saptānāṃ samyaksaṃbuddha koṭīnāṃ tadyathā oṃ cale cule cunde svāhā For Conze, the ultimate phase of the event of Buddhist mantras could be the tantric stage of Mantrayana. On this tantric phase, mantras are on the quite Centre https://www.instagram.com/tantramantraaurvigyaan/