One of his offices, even though it is not well known is the ascendance and growth of the magician. So if you want to curse someone, do it in a way that will make you grow as a person or in a way that will evolve your magickal skills. This is why he can be dangerous. He wants to get the magician to his limits so that he surpasses them. Andras is awesome he can be also a very risky choice if you dont know what you are doing.