Dear all , let me outline the perfection of the karnapischaachini sadhana.
The sadhana for karnapischaachini is to be done on a corpse (aghora) or in shavasana in the cremation ground. The mantra repetitions are for 100,000 times and the 10,000 number of it has to be done as a homa with konna chamatha. The siddhi will bestowed.
If the person has performed it without keeping the "shuddha" state, it will lead to the grace of the goddess.
With this perfection, the aspirant will be told about the thoughts of others by the goddess on his ear. She can tell you the past, any events. But she cannot tell you the future
many famous sages have used this sadhana for getting a commentary on certain events without diverting their spiritual energy for knowing the same.