I play a Protean Scribe (from Mythical Classes by LPJ Design) and it has word powers. You can write a story so eloquent that you can bring the very creatures and objects of your story into existence.
In either case, the storied creature or object is obviously magical, radiating dim light in a 5 ft radius. An object or creature remains until it is reduced to 0 hit points, you choose to erase the story, or until you take a short or long rest.
If I cast Nystul's magic aura, can I prevent the creature radiating dim light in a 5-foot radius? Does this spell mask this effect?