A Nocturne has decided to play with Umbra magic, using it to perform some sneaky slight-of-hoof in a game of cards.
Umbra is the control of shadows, and is often connected to the realm of spirits. In the Path of Six, it is a virtue of Thoughtfulness yet it is a Vice of Doubt.
She can be found in the Roan RPG book, along with more of the story behind Æther.