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:
|Ingredient||Primary Effect||Secondary Effect||Tertiary Effect||Quaternary Effect|
|Dragon's Tongue||Resist Fire||Fortify Barter||Fortify Illusion||Fortify Two-Handed|
|Dwarven Oil||Weakness to Magic||Fortify Illusion||Regenerate Magicka||Restore Magicka|
|Mora Tapinella||Restore Magicka||Lingering Damage Health||Regenerate Stamina||Fortify Illusion|
|Scaly Pholiota||Weakness to Magic||Fortify Illusion||Regenerate Stamina||Fortify Carry Weight|
|Taproot||Weakness to Magic||Fortify Illusion||Regenerate Magicka||Restore Magicka|
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.