Also that retains some sort of religion during the advantage of yantra and also the mantras connected to it. It's also wise to remember the Yantra will not be a tool which is intended for the maniping or hurting of some people. Lord Shiva discovered the mantra to Mata Parvati, https://socialbuzzfeed.com/story5111033/vashikaran-things-to-know-before-you-buy