The most effective yantra that is very useful in overcoming enemies is the Baglamukhi Maha Yantra. The enemies might be anything from competitors at work or business or problems in life and health such as sickness or success in surgery.
There are some precautions to be taken care of when handling the yantra. It is essential that this yantra is engraved only on copper plate. It should be placed on a wooden choke on which a yellow aasna is put. For best results the Chamundi Beej Mantra is to be recited while sprinkling water over the yantra using the right hand. With this yantra you can be assured of success in all challenges with enemies.