Not to mention that this is Old Testment law, which a large portion of are superceded by the teachings of Jesus:
We are taught to be forgiving, understanding, compassionate, To not judge, or kill. To love our neighbor. These teachings bring us to a higher stage of spiritual development than that of the ancient Hebrews.
As far as the talking snakes and 10 headed monsters, here is what is in the CCC about Witchcraft:
All forms of divination are to be rejected: recourse to Satan or demons, conjuring up the dead or other practices falsely supposed to “unveil” the future. Consulting horoscopes, astrology, palm reading, interpretation of omens and lots, the phenomena of clairvoyance, and recourse to mediums all conceal a desire for power over time, history, and, in the last analysis, other human beings, as well as a wish to conciliate hidden powers. They contradict the honor, respect, and loving fear that we owe to God alone. (CCC 2116)
All practices of magic or sorcery, by which one attempts to tame occult powers, so as to place them at one’s service and have a supernatural power over others—even if this were for the sake of restoring their health—are gravely contrary to the virtue of religion. These practices are even more to be condemned when accompanied by the intention of harming someone, or when they have recourse to the intervention of demons. Wearing charms is also reprehensible. Spiritism often implies divination or magical practices; the Church for her part warns the faithful against it. Recourse to so-called traditional cures does not justify either the invocation of evil powers or the exploitation of another’s credulity. (CCC 2117)