Black Garuda mantra can heal cancer, leprosy, and skin diseases. To heal others recite many mantras and blow on their crown, throat, and heart.

To protect from spirits that come while you are sleeping, that crush you and prevent you from making a noise, visualize yourself as the deity, and the spirit will leave immediately. You can also protect yourself from the spirit by tying seven knots in a black thread and visualizing Black Garuda in each of these knots (generate yourself as the deity first) and that the person who is receiving the spirit harm is also in the knot.

You have to do this practice with a bodhicitta motivation. You can do it for yourself or others.

For hailstorms that destroy crops, generate yourself as Black Garuda and blow at the sky. The sky is then filled with garudas from whom come blazing fire, which melts the hail into water. Then all the garudas line up in the sky and chase the hail away. You can also do this to make rain stop.

For serious diseases, such as hepatitis C, leprosy, warts, epilepsy, chickenpox, smallpox, also piercing pain, wear Hayagriva protection or Black Garuda protection. Hayagriva is also excellent for epilepsy.

There is a lama in Nepal who does chöd and gives black blessing strings to people, which are very powerful. Probably these are Black Garuda strings.