What is this mantra ?
Whatever problem in life is definitely due to past negative causes, you just have to put some effort to purify all those negative action whether you remember the action or not. By purifying negative karma, simultaneously will accumulate merit also. This will bring great prosperity in life, therefore I would like to suggest one very powerful purification mantra, which just by reciting one time, it will purify hundred million eons of negative karma, the name of this mantra is called Super Purification Mantra, the mantra is:
Namah Sarwa Tathagatha Hridaya Anuh Gatey Om Kurum Ghini Svaha
You can recite as many number as possible, and visualize white light in the form of having power of purification entering from your crown and to pervade in all of your body and mind, and purify all negativity visualizing that in the aspect of black smoke coming out of you. After that visualize oneself completely bliss out of your senses including your mind, and feel great joy that you have received the complete purification and gain the state of purity in your body and mind as clean clear as crystal. At the end of this short visualization meditation, one should feels conviction and faith and great satisfaction that one has definitely purify all the negativities.