Cursing
To curse someone means to cast a negative spell on a person. Some witches will cast negative spells for a very high fee.
In the north of Co Carvan, Eire there is a cursing stone - it is a large horizontal slab with 13 bullans cut into it, and in each bullan apart from one there is a curser. To curse someone you have to remove all the stones without letting one slip, then your curse will be effective, but should a stone slip the curse will backfire onto you.