from what I understand:
'Those Ji-Ying rituals where they bury the client's belongings & personal effects in a good fengshui place in the grave yard might be classified as black arts and might also be related to fengshui".
I have also heard about this from Hong Kong, its know as 造生基 This is when someone is in down luck and is involved in lawsuit with serious case. They will engage a FS master to perform such rital requiring your nails, hair, clothes etc, they will choose a good time and day, dig a hole on the ground and buried with your belongings. Choosing a good day and time means that you are reborn with a good 八字.... To me, its like cheating the gods.... lol...