Usually, a player is allotted a number of points for character creation. A character's attributes (such as high intelligence), skills (such as fixing a car or "mechanics"), or powers (such as flying) can then be bought for a certain number of points. More powerful abilities or a greater degree of power will require more "spending" of character points. Later, character points can be earned and spent to improve attributes or skills, or to buy new skills or powers. In some games, such as "Champions", these points are experience points; in others, such as "Ars Magica", there is a more complicated relationship between experience points and character points.