These Yantras bestow some pretty awesome Siddhis or powers. HOWEVER do keep in mind that they require YOU to perform many (thousands in some cases) mantras, and sometimes even puja / offerings. Most of these are just mantras which are required though since not everyone knows how to perform puja. Siddhi usually come over time through commitment to regimented austerities, worship, and alternatively Diksha (transference or blessing) from a guru or initiated practitioner. Siddhi generally considered to only be symptoms or side effects of spiritual growth, spiritual development, and evolution. These should be looked upon with reverence and a genuine heart as being spiritual blessings and should never be misused. These belong to the gods and deities and cannot necessarily be bought or clutched by anyone who so desires. We offer these because they form a part of classic tantrik practices and are a form of empowerment.