four powerful Dharmakaya Relic mantras
Four mantras placed in holy objects such as stupas. Simply circumambulating an object containing these mantras purifies the karma to be reborn in the hot hells. They are: the most precious heart mantra of stainless beam, the most precious mantra of secret relic, the most precious mantra of ornament of enlightenment and the very precious root mantra of stainless pinnacle.