I have heard that if a person is suffering from a tragic "death" threatening disease or illness such as "cancer", there is a great and very powerful practice that can help alleviate this type of bad situations including black magic and spirit harms. In fact it can even prolong the practitioner's life. Here is a short excerpt from Lama Zopa Rinpoche himself...
Vajrapani Hayagriva Garuda"Certain deities manifest to protect sentient beings from the harm of nagas. The Vajrapani-Hayagriva-Garuda deity, for example, specifically manifests to protect sentient beings from nagas as well as from harmful spirits. Vajrapani, embodiment of the perfect power of all the Buddhas, is the opponent of the spirits that cause such things as epileptic fits.
Of course, we have to remember that the actual origin of harm from nagas and spirits is our own three poisonous minds of ignorance, anger, and attachment. Nagas and spirits are simply conditions for our disease; the real cause of their harm is our own mind.
While Vajrapani-Hayagriva-Garuda practice is a remedy to spirit harm, its ultimate purpose is to liberate us from the three poisonous minds. We should do the practice not just to protect ourselves from this harm, but to liberate ourselves by actualizing the path of method and wisdom within our mind.
Our ultimate aim, of course, is to cease karma and delusion, thus overcoming not only disease but the entire suffering of samsara, including the cycle of death and rebirth. We will then be able to complete the path to enlightenment and work perfectly for all sentient beings."
- Kyabje Lama Zopa Rinpoche
Vajrapani Hayagriva Garuda Mantra
Om Vajrapani Hayagriva Garuda Hum Phat (7x)[/size]
( To clear inner, outer and secret obstacles especially spirit harms, naga harms, causes of negative energy and to create protection for all purposes - by Geshe Tenzin Zopa)