Your magic is much more potent in a fairly limited area, such as weather, necromancy, birds, or emotions. This area should be smaller than a single Art, but may be spread over several Arts – necromancy, for example, covers both Corpus and Mentem effects. You cannot be focused on laboratory activities, although a focus does apply to laboratory activities.
Sample Major Magical Foci :
This list is merely exemplary. Other foci are possible.
Animal: Birds, or mammals, or domesticated animals.
Aquam: Salt water or fresh water.
Auram: Weather.
Corpus: Men or women.
Herbam: Trees or food plants.
Imaginem: Visual images, auditory images, tactile images, or taste and smell together.
Mentem: Emotions or memories.
Terram: Metals or stone.
Necromancy: Corpus and Mentem as applied to the bodies and spirits of dead people.
Damage: Any Art, as long as the effect does damage directly, either by inflicting a wound or doing a certain amount of damage which can be soaked.
Disguise: Changing the appearance of something, by any means.
When you cast a spell or generate a Lab Total within your focus, add the lowest applicable Art score twice. If a spell has requisites, the lowest applicable score may be one of the requisites, rather than one of the primary Arts. Thus, if a magus with a focus on birds was casting a spell to turn a bird into pure flame, MuAn (Ig), with Muto 14, An 18, and Ig 10, his final total would be 34 + other modifiers: 14 from Muto, and 20 from adding Ignem twice. If he was casting a spell to turn a bird into another sort of bird, MuAn with no requisites, his total would be 46 + other modifiers, 18 from Animal and 28 from adding Muto twice.
A character can have only one Magical Focus, either major or minor, regardless of the source of the focus.
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