There is a wide variety of literature, both ancient and modern, that points to the use of magic spells throughout the ages. A large number of books or papers have been written by well respected historians and authors on some of the more famous instances where magic was allegedly used.
One thing is certainly acim . People have lost their lives over the centuries to supposed evidence of magic spells. A large number of these people were either innocent bystanders caught in the middle or falsely accused. The burning of witches at the stake during the Middle Ages is one well documented example of the pain of reality.
Another well publicized event is the Salem Witch Trials held in Massachusetts during 1692 and 1693. There is more than enough lack of evidence surrounding the whole episode that no conviction would be obtained today. Most of the accusations appear to be either outright lies or had been coerced by authorities. Nineteen people were convicted and hung as a result.
The most widely followed religions in the world all have some form of magic in their books. They don't necessarily call it magic, of course, preferring to use such terms as miracle instead. Whatever you want to call such things they can be construed as magic spells.
Some examples of what have been termed miracles could easily be called magic or illusion but because they are associated with a major religion they are termed miracles. Some of the more well publicized ones are a statue weeping human blood, an apparition of the Virgin Mary, the silhouette of the Virgin Mary on a building and Muslim symbols found inside vegetables. The largest miracle in the last twenty years involved Hindu statues drinking milk all over the world in 1995.
Modern society chooses to call these type of events miracles when they could just as easily be called magic or illusion. Christians believe in the miracles of Christ and Pagans believe in magic. In the end it boils down to religion or faith as to whether magic spells are a myth or reality.