Illusionist
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The illusionist is an example of a specialist. The description of the illusionist given here can be used as a guide for creating wizards specialising in other magical schools.
Because the illusionist knows far more about illusions than the standard wizard, he is allowed a +1 bonus when rolling saving throws against illusions; other characters suffer a -1 penalty when rolling saving throws against his illusions. (Modifiers applicable only if the spell allows a saving throw.)
Through the course of his studies, the illusionist has become adept at memorising illusion spells (though it is still an arduous process). He can memorise an extra illusion spell at each spell level. Thus, as a 1st-level caster he can memorise two spells, although at least one of these must be an illusion spell.
Later, when he begins to research new spells for his collection, he finds it easier to devise new illusion spells to fill specialised needs. Research in other schools is harder and more time consuming for him.
Finally, the intense study of illusion magic prevents the character from mastering the other classes of spells which are wholly alien to the illusion school. Thus, the illusionist cannot learn spells from the schools of necromancy, invocation/evocation, or abjuration.
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