Witchery allows players to explore the magical art of witchcraft and though it, to learn to control the natural magic present in the world (and sometimes other dimensions).
Witchery provides several branches of witchcraft for a new witch or warlock to try their hand at. Witchcraft does not really resemble the flashy spell-casting performed by wizards and their ilk. There are no magic wands or spell books, enchanted armor or flaming swords; instead, a well tended witch's garden will provide a lot of helpful ingredients for magic that will get you out of the occasional scrape.
There are of course darker sides to magic; and although these may bring power more quickly, the cost may be too high. Making bargains with demons should never be undertaken lightly!