Preventing Harm From Black Magic
Rinpoche gave the following advice to a student who was very sick, possibly being harmed by black magic. Rinpoche advised her daughter and another friend to do the practice of Twenty-one Taras in this way.
The practice of the Twenty-one Praises to Tara can be done in this way, where the practice becomes specific according to the problems and obstacles being faced by that person. If it's a disease, it can have that focus. If somebody is trying to avoid prison, it can have that focus. Every problem or fear can be approached with this practice.
Please perform the Twenty-one Praises to Tara at the Dharma center four times in a week. As you are not doing the full sadhana, you should start with refuge and bodhicitta, then the four immeasurable thoughts, then generate bodhicitta, followed by the seven-limb prayer and short mandala offering.
When you do the Twenty-one Praises to Tara, you can recite each of the Tara mantras, with a strong prayer to each Tara for her to recover from her illness.
When it comes to White Tara, recite the White Tara mantra thirty times, sending white purifying light to her.
When it comes to Tara Destroying all Obstacles, recite this mantra seventy times, visualizing Tara sending light destroying all obstacles, diseases, spirit harm, and negative karma. Recite the mantra with this visualization.
When it comes to the Tara giving long life, recite her mantra fifty times, sending light pacifying all life obstacles and untimely death.
When it comes to the Tara whose purpose is to prevent harm, especially black magic, recite her mantra fifty times.
You can repeat this up to three times. This means, for the first one to three recitations of the Twenty-one Taras, you can elaborate as I have explained here. After doing one to three recitations of the Twenty-one Taras this way, then you can continue doing the Twenty-one Praises in the normal way.
At the end, read the benefits of reciting Tara praises and then recite the dedication prayers. There are seven important dedications, like the King of Prayers, that you can read. You can choose.