Hysh is the magic of illumination and holy radiance. It is the Aethyric manifestation of light, including the uses light can be put to and the abstracts that light sometimes represents to mortals, like enlightenment and purity. Hysh could be seen as the light that banishes the darkness and keeps the unknown horrors of the darkness from our doors. Though diffused, Hysh can be compared to a constant and steady luminance completely opposite of Chaos' randomness. It is also said to be the most difficult of all the fragmented Winds of Magic to channel into a spell.
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Hysh has many potent applications, and its Magisters are renowned for their abilities to heal, protect, and banish darkness—in both a literal and more occult sense. The White Magisters of Hysh, or Hierophants as they are sometimes known, are amongst the wisest and most disciplined of all Magisters, vehemently opposed to the Chaos in all its countless forms. Where Hysh is steady and constant, Chaos is random destruction, and where Hysh stands for controlled grace and self-understanding, Chaos promotes confusion, insanity, and a total lack of control. It is with good reason that the Magisters of Hysh are particularly renowned for their abilities to banish from the Mortal Realms the malevolent entities of Chaos.
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White Magic
The nature of the White Order's magic is as hard to pin down as the magic that forms and drives it. The spells of the White Order tend to fall into three general groups: illumination, protection or healing, and abjuration.
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Illumination
These spells fall into two sub-categories: those of actual illumination (as in the creation of dazzling lights and so on) and the illumination of the mind (such as the ability to inspire or see through falsehoods). Hierophants are renowned for their mastery of light and brightness, and they are said to be able to bend any kind of luminance to their will in almost any way. Where the Pyromancers of the Bright Order create bright, burning fireballs and walls of flame, the Hierophants are able to concentrate light into a tightly focussed destructive force, which, although more limited than the destructive powers of the Pyromancer, is far more controllable and able to be directed because of it.
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Healing & Protection
The Order of Light teaches the importance of the sanctity of existence and possesses a great wealth of spells dedicated to healing injuries and protection. This drive to heal and protect is geared more towards the preservation of the spiritual being of intelligent and sentient life, rather than a mortal's body, which is more the concern of the Magisters of Ghyran. Because of this, Hierophants are generally peaceful and non-violent, but they are not total pacifists like the sisters of sweet Shallya. Against the creatures and servants of Chaos and Dark Magic, the Hierophants are utterly ruthless, as devoid of compassion as they are of hate or fury for these creatures. To the Hierophants, the minds and souls of Chaos servants are filled with darkness, and the creatures' natural luminance has dimmed or has been extinguished altogether. And so, the Hierophants do not view such beings worthy of the gift of life and consciousness.
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Abjuration
The abjuration practiced by Hierophants of the White Order isn't about summoning spirits and various Aethyric beings but is instead a form of extremely powerful and dependable exorcism. Where the exorcism practised by the priests of Sigmar or Mórr relies on invoking the God in question and the supreme faith of the exorcising priest, the exorcism practiced by the Hierophants relies upon their ability to focus the searing light of Hysh into the possessed person, driving the offending entity into the light of day.
However, the magic of Hysh has very limited success exorcising the spirits of dead people not overly tainted with Dark Magic. If Hysh is the light that banishes the darkness, it cannot banish a soul that is already luminescent, just lost. Daemons and spirits of the blackest magic, like wraiths, are another matter. The great Hierophants of the White Order are able to drive these creatures back to the darkness of the Chaos Realm.