In the Licanius Trilogy, book 1 The Shadow of What was Lost, one of the protagonists, Davian, fears that, should he fail the 'Trials', where Gifted are tested for control of their powers, he will be made a Shadow.
The rest of the question is going in a spoiler tag for those who haven't finished the book.
We later learn that Davian is an Augur, and at some point in his life, died. It seems his Augur abilities kicked in automatically, and revived him. He has no internal reserve of Essence, and instead draws it from sources around him, constantly. We also learn that the Vessel for creating Shadows works by linking their reserve to someone else, blocking it the Shadows reach (mostly). But, without a reserve, could Davian have even become a Shadow as he originally feared?