Tantric mantras
This grouping covers mantras from the Tantras and the Agamas. Many widely recited deity mantras are neither Vedic nor Tantric but Pauranic or stotra literature — those are listed separately below.
2 mantras
TantricMantra
Om Gam Ganapataye Namah
The Ganesha bija mantra, built on the seed syllable gaṃ given in the Ganapati Atharvashirsha.
Ganapati Atharvashirsha (Ganapati Upanishad)Ganesha6 syllables
TantricMantra
Navarna Mantra (Chamunda nine-syllable)
The nine-syllable Devi mantra used in the recitation of the Durga Saptashati.
Durga Saptashati (Devi Mahatmya) Navarna vidhiDurga9 syllables