Manini Yakshini Mantra Siddhi Sadhana
The Mantra Sadhana should be performed in a place where 4 legged animal stay or which is frequented and populated by 4 legged animals.
The Sadhak should sit down comfortably and chant the Manini Yakshini Invoking Mantra, given below 125,000 times, taking breaks only for essential and unavoidable chores.
After the completing of the Mantra Chanting, the Sadhak should perform Dashansh Havan of Red Colored Flowers and Three Scented/Perfumed/Sweet Smelling Items. Dashansh Hanvan in this case means 12, 500 offering to the Havan, while chanting the Manini Yakshini Invoking Mantra.
ऐं मानिनि ह्रीं ऐही-ऐही सुन्दरी हस-हस समीह में सगमकं स्वाहा ||
Aim Maanini Hreem Eahi-Eahi Sundari Has-Has Samiha Mem Sagamakam Swaha ||
The Manini Yakshini will then as per the writings of the Yakshini Tantra have physical intercourse with the Sadhak and satisfy him beyond his widest imagination or dreams.
Then lastly, the Manini Yakshini bestows the Sadhak with a Magical Sword, which will make him immensely strong and powerful in battle.
Notes- The Tantrik text has not provided any other information on conducting this Yakshini Sadhana, hence, it should be noted that what is mentioned in the post is the only important requirement and other things like Mala, Aasan, Tithi, Direction and Place can be selected by the Sadhak.
By Sadhak, I mean, only the advanced Yakshini Siddhi Sadhana Practitioners who are well-versed with such Aghori Mantra Sadhanas and not the Lay-Persons.