According to Lama Zopa Rinpoche, “Mitrugpa is very powerful in degenerate times in purifying negative karma, particularly the negative karma of having broken vows, such as the eight Mahayana precepts, lay vows, or the vows of nuns and monks. Even if you believe in karma and reincarnation and do not generate heresy, you create the cause to be born in the animal realm as a naga if you break or degenerate your vows."