Witch Sea Loredump #2: Mana, Magi and Magic Tools
Witches aren't the only people who can wield magic, simply the only ones who can do so without external help. Anyone else looking to use magic must do so with the help of something called a magic tool. People uniquely suited for using magic tools are called magi.
(or, Radiation, but Fantasy and Stuff)
Attached to every body like an unpleasant sibling or a big fuzzy spider is the soul. The soul is essentially the magical component of the body. Most people have one regardless of what their in-laws say. The world is full of excess magical energy which tends to cling and attach to people's souls: eating food draws remaining magical energy from the food, for example. All things are cyclical however and the soul rotates out older magic back into the world as it take in new energy. This radiating extra magic the soul no longer has use for is called mana and it tends to hang around the body that let it off until it can