Matangi Yantra along with its Mool Mantra is considered very effective medium to fulfil Matangi Sadhana.
ॐ ह्रीं ऐं भगवती मतंगेश्वरी श्रीं स्वाहा॥
Om Hreem Aim Bhagawati Matangeshwari Shreem Svaha॥
Ashtottara Shatanamavali of Matangi
list of Matangi Mantras
10 forms of Shakti