Wicca became a movement during the 1950s in England with the publishing of books by Gerald Gardner. Wicca is a difficult group to define because each group of people claiming to be Wiccans may in fact have different beliefs and may practice different rituals.
To give you an idea of the variety of Wiccan beliefs, some are atheist (don’t believe in God), some worship many gods and goddesses from Celtic traditions, a small number of Wiccans follow the traditions of witches who lived in the dark ages by devoting themselves to the devil (most modern Wiccans reject the idea of a devil), while most Wiccans worship two deities called the “Goddess” and the “Horned God” (portrayed as half man and half animal).
In every case, Wicca is a form of the occult; its followers routinely practice divination and magic and most believe in reincarnation. Whether or not these people feel that they are worshiping the devil is irrelevant to the fact that they are indeed doing so.
The Book of Shadows is considered to be the central sacred text of the Wicca religion, even though there is no official copy. Typically each coven (group of Wiccans) has a handwritten copy reflecting its own practices and knowledge. Wicca generally sees sex outside of marriage and any other form of worldly pleasure, including the use of drugs, as good and healthy practices.
One of the main reasons Wicca is dangerous is that members of Wiccan groups are usually required to bind themselves to the group with an oath promising not to reveal any of its secrets at the punishment of death.
In short, Wicca is mostly made up of rituals and oaths and is not usually violent, however many who begin as Wiccans open the door for future experimentation in the more dark and dangerous forms of the occult.
The great news is that the Name of Jesus has been exalted over every name that is named, and Wicca holds no power over anyone who will call on the Name of Jesus (Philippians 2:9-10; Romans 10:13)!