In order to use magic one has to use Power. Several possible sources are listed below.
Person as a source[]
- The simplest supernatural abilities, some of which not even considered magic, are based only on the intellect of the user. Persons who utilise the power of
mind are referred to as psionics. - Some individuals are born with innate magical potentials. They are called Sources and have the Power of their own. Some mages use them as mobile canisters of energy but it is considered immoral nowadays.
Element as a source[]
There are four Primary Elements (and unknown number of Para-Elements) sourced in elemental planes. Manifesting themselves in the world through Intersections (places of Power) they are the basic sources of Power. While most of the spells work best if use one specific element, casting them utilising another is still possible though hard.
Quintessence or Mixed Elements[]
The most complicated spells base on 
Ether, or Spirit. Mages who want to cast them must either draw to its plane, called Ether, or mix the Primary Elements.
Black Magic[]
Though banned by the Brotherhood of Sorcerers the forbidden arts still lure practitioners due to the possibilities they offer.