Foci

A Focus, plural Foci and more commonly referred to in plural, is an item of arcane potential. In most cases, it is a prepared object, able to contain Mana or other arcane powers. Foci in general are containers of magical properties. Their true potential can only be seen by those with knowledge in the fields of Arcana, the theory of magic.

For a list of possible Foci to be bought, see here.