structural:scholar_edition, quality:corruption, information:filtering
Beliefs about practices

Witches are commonly believed to cast curses; a spell or set of magical words and gestures intended to inflict supernatural harm. Cursing could also involve inscribing runes or sigils on an object to give that object magical powers; burning or binding a wax or clay image (a poppet) of a person to affect them magically; or using herbs, animal parts and other substances to make potions or poisons. Witchcraft has been blamed for many kinds of misfortune. In Europe, by far the most common kind of harm attributed to witchcraft was illness or death suffered by adults, their children, or their animals. "Certain ailments, like impotence in men, infertility in women, and lack of milk in cows, were particularly associated with witchcraft". Illnesses that were poorly understood were more likely to be blamed on witchcraft. Edward Bever writes: "Witchcraft was particularly likely to be suspected when a disease came on unusually swiftly, lingered unusually long, could not be diagnosed clearly, or presented some other unusual symptoms".

A common belief in cultures worldwide is that witches tend to use something from their target's body to work magic against them; for example hair, nail clippings, clothing, or bodily waste. Such beliefs are found in Europe, Africa, South Asia, Polynesia, Melanesia, and North America. Another widespread belief among Indigenous peoples in Africa and North America is that witches cause harm by introducing cursed magical objects into their victim's body; such as small bones or ashes. James George Frazer described this kind of magic as imitative.

In some cultures, witches are believed to use human body parts in magic, and they are commonly believed to murder children for this purpose. In Europe, "cases in which women did undoubtedly kill their children, because of what today would be called postpartum psychosis, were often interpreted as yielding to diabolical temptation".

Witches are believed to work in secret, sometimes alone and sometimes with other witches. Hutton writes: "Across most of the world, witches have been thought to gather at night, when normal humans are inactive, and also at their most vulnerable in sleep". In most cultures, witches at these gatherings are thought to transgress social norms by engaging in cannibalism, incest and open nudity.

Witches around the world commonly have associations with animals. Rodney Needham identified this as a defining feature of the witch archetype. In some parts of the world, it is believed witches can shapeshift into animals, or that the witch's spirit travels apart from their body and takes an animal form, an activity often associated with shamanism. Another widespread belief is that witches have an animal helper. In English these are often called " familiars ", and meant an evil spirit or demon that had taken an animal form. As researchers examined traditions in other regions, they widened the term to servant spirit-animals which are described as a part of the witch's own soul.

Necromancy is the practice of conjuring the spirits of the dead for divination or prophecy, although the term has also been applied to raising the dead for other purposes. The biblical Witch of Endor performed it (1 Samuel 28th chapter), and it is among the witchcraft practices condemned by Ælfric of Eynsham: "Witches still go to cross-roads and to heathen burials with their delusive magic and call to the devil; and he comes to them in the likeness of the man that is buried there, as if he arises from death."