Wizard's five and six represent two very different approaches to the Art of Magic in the Warhammer Fantasy world. First, an Amethyst Wizard, a practitioner of magic that deals with Death, the spirits of the Dead and the ability to deal Death upon the enemies of the Empire.
Such magical powers are deadly and dangerous, bordering on such Dart Arts as necromancy and the raising of the dead for evil purposes.
The sixth wizard is the opposite of all that Darkness, being a White Wizard of the College of Light.
White or Light Wizards are healers, discoverers of truth and bearers of the holy light that banishes darkness and the denizens of the dark. Their skills can be used to exorcise the possessed and to combat the forces of Chaos.
Of the two figures, I think I did a better job with the Amethyst wizard, because at this magnification I can see all manner of things wrong with the face of the Light wizard, which is a shame because I really like his robes, staff and Orb of Light. Still, he looks OK to the naked eye, which is what really matters.