You use shadowstuff to create a quasi-real evocation effect. When you cast this spell, choose an transmutation spell from any spell list that is 3rd level or lower. This spell copies that spell in its entirety, and acts as if the copied spell were cast from a 3rd level spell slot. The copied spell is treated as an illusion spell, instead of a transmutation spell.

A creature that would be affected by the copied spell’s effects must make a Charisma saving throw. Succeeding on its saving throw means the creature is completely unaffected by the copied spell, even if the copied spell doesn’t normally allow a saving throw. Such a creature can see through a copied darkness effect, walk through a copied wall of stone, is unharmed by a copied fireball, and so on.

At Higher Levels. When you cast this spell using a spell slot of 5th level or higher, the maximum level of enchantment spell you can copy increases by one level, and the spell slot it is treated as being cast from increases by one level for each slot level above 5th.