Where a spell effect is brought to life by manipulating the threads of the Weave, the creation of a magic item ties some of those threads together in a specific way, to produce the desired effect for as long as the item lasts. The Weave provides immediately available energy for spells and also enables those who know the craft to harness that energy inside an object until it is called forth by its user (who, of course, need not be a spellcaster). In some cases, the magic of an item must be tied to its wielder, representing an entwining of the threads of the Weave between wielder and object known as attunement. As with all matters related to magic, the number of items to which a single being can be attuned is limited, but the benefits of such a relationship can be considerable.