Those who think that the practice of magic is evil need to consider this; prayer is a form of magic. Many quote from the Bible believing that the sacred Scriptures are filled with the power of God and will ultimately manifest that which they desire. Some light candles and pray to ascended masters or Saints, and others place prayer petitions in the crevices of sacred walls or near statues of holy men and women believing that this will give their words extra power. There are many forms of prayer and many of them use what the magician calls incantations either spoken or written as well as icons, anointing oils and holy water.
We must also realize that the Bible is filled with stories that contain elements of magic: Moses parted the Red Sea, he turned his staff into a serpent. Jesus turned water into wine and multiplied a few loaves of bread and a couple of fish into a banquet that fed over 5000 people. If I were to document all of the magical acts done in the Bible, I would be blogging them four months.
As far as communicating with spirits go; the Bible is filled with such stories. Even Jesus talk with the spirits of Moses and Elijah atop the mountain where he was transfigured into a being of light. Those who condemn such practices should look more closely at their own sacred books and see what is written therein. Jesus himself said, judge not lest you be judged... Wise words indeed.