|Form ID||0003EB27 - (Alchemy)|
0007A0FA - (Enchanting)
Fortify Illusion is a name shared by two effects, one granted by consuming alchemical ingredients or potions made from those ingredients, the other an effect hewn into enchanted apparel in The Elder Scrolls V: Skyrim.
Alchemical ingredients containing Fortify Illusion, an effect that increases the power of illusion spells:
Robes of Illusion can be enchanted with Fortify Illusion & Magicka Regen, an enchantment distinct from Fortify Illusion that combines the effect with additional Magicka Regeneration into one enchantment in exchange for a reduced potency of both effects.