You can add shadow energy to your illusion spells to make them partially real.
Prerequisites: Arcane spellcaster level 1st+, ability to cast at least one school from the illusion school of magic.
Benefit: A reality-infused illusion is quasi-real, like the shadow evocation spell. Damaging spells still deal the portion of their damage that is real even if the spell is recognized as an illusion. Nondamaging effects have no effect when they are recognized as illusory. Only illusion spells that do not have the shadow descriptor may be infused.
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