Arcane Enlightenment (Su): The shaman's native intelligence grants her the ability to tap into arcane lore. The shaman can add a number of spells from the sorcerer/wizard spell list equal to her Charisma modifier (minimum 1) to the list of shaman spells she can prepare. To cast these spells, she must have an Intelligence score equal to at least 10 + the spell's level, but the saving throw DCs of these spells are based on her Wisdom rather than Intelligence. When she casts these spells, they are treated as divine rather than arcane. Each time the shaman gains a level after taking this hex, she can choose to replace one of these spells with a new spell from the sorcerer/wizard spell list.
This means he can choose it.
You use material from the Plane of Shadow to shape quasi-real illusions of one or more creatures, objects, or forces. Shadow conjuration can mimic any sorcerer or wizard conjuration (summoning) or conjuration (creation) spell of 3rd level or lower.
Any spell a shaman casts will be a shaman spell, even if he got it by access to the sorcerer/wizard list.
Does that mean that those spells are useless for shamans (and other classes that might have a way to gain access to them)?