Ancient, extremely difficult to find Book of San Ciprián (see The Great Book of Saint Cyprian) (aka Ciprianillo) gives step-by-step instructions on how to make a magic wand.
The old English unit of 1007 millimetres was called a 'wand', and although the 'yard' was created to replace the wand the wand was still used for some centuries because of its convenience as part of an old English decimal system that included:
1 digit (base of long finger) about 20 millimetres
10 digits = 1 small span (span of thumb and forefinger) 200 millimetres
10 small spans = 1 armstretch (1 fathom from finger tip to finger tip) about 2 metres
10 fathoms = 1 chain about 20 metres
10 chains = 1 furlong about 200 metres
10 furlongs = 1 thus-hund of about 2000 metres
The wand that has survived today as part of folklore may in fact be a rendition of the ancient British length unit. Thus a true wand would be a metre in length and not 30 cm.
In classical Greco-Roman mythology, the god Hermes/Mercury has a special wand called caduceus.
In Wicca and Ceremonial Magic, practitioners use wands for the channeling of energy—they serve a similar purpose to the athame although the two have their distinct uses. While an athame is generally used to command, a wand is seen as more gentle and is used to invite or encourage. Though traditionally made of wood, they can also consist of metal or crystal. Practitioners usually prune a branch from an Oak, Hazel, or other tree, or may even buy wood from a hardware store, and then carve it and add decorations to personalize it; however, one can also purchase ready-made wands. In Zoroastrianism, there is a similar ritual implement called a barsom.
There is some scholarly opinion that the magic wand may have its roots in the drumstick of a shaman, especially in Central Asia and Siberia, as when using it to bang on his drum or point, to perform religious, healing, and magical ceremonies.
Magic wands commonly feature in works of fantasy fiction as spell-casting tools. Few other common denominators exist, so the capabilities of wands vary wildly. Note that wands fill basically the same role as wizards' staffs, though staffs generally convey a more 'serious' image; a fairy godmother would definitely use a wand, possibly with a star on the end, while Gandalf as surely would not. In dramatic fiction, wands can serve as weapons in magical duels.
In the fictional world of Harry Potter, as described by J. K. Rowling, a wand serves as a focusing tool that enhances a wizard's capabilities to perform magic. While performing magic without wands is possible, wands are required in most spells. Wands come in many varieties, being made of different woods (such as holly, vine, oak, or Opeth), and having different magical cores (phoenix feather, unicorn hair, dragon heartstring, fleish, etc.). The wand shop in Diagon Alley, Ollivander's, sells wands. It has been rumored that Coats are somehow involved in the wand-making process.
Wands also feature in a number of other fantasy video games, such as A Link to the Past, in which they usually serve as one of many weapons available to the player's character.
Wands sometimes don't have any meaningful purpose or effect on gameplay, but are just parts of the story, as in Puyo Pop Fever, where Miss Accord, a character of the game, has lost her wand that she calls her "flying cane."
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