It was a gamble, one that if wrong could have led to unsavory consequences.
The Ability utilized by Alex to help him perfectly embody the person that was once Lucius was something he was able to create only because Adam was nice enough to agree to his request.
Simply named Dark Transformation, Alex gained inspiration for the Ability from whatever Nyx had done to allow him to keep his original appearance while others saw him as the dead Alex.
Of course, his worked differently as instead of just a vague illusion, Alex sought to embody the person he wished to impersonate for the sole worry that just like how people were able to see through the essence of Nyx's trickery, they would be able to see through his, after all, would his attempt be any better than the godlike being that was Nyx?
He thought not.