None, like all other sacraments, the Holy Orders was something the exact form of which the Church developed after the Pentecost. There is nothing magical in laying of hands per se, just like there is nothing magical in eating bread or taking a bath. They become sacraments when the Church attaches a prayer that asks the Holy Ghost to bring grace to it.
Occult adj. & n.(referring to the)supernatural; magic.
Deut. 18:10-12 ...or one who practices witchcraft,...,or a sorcerer...For all who do these things are an abomination to the LORD...