Prerequisite: Path of the Twilight Veil

Benefit: The nightblade can use shadow magic to hide the fact she is casting a spell. By spending a shadow surge as a swift action when casting a spell, the nightblade can make a Sleight of Hand or Bluff check to hide her casting. Observers must make an opposed Perception check (if the nightblade used Sleight of Hand) or a Sense Motive check (if the nightblade used Bluff) to realize she is casting a spell. Using this ability with a spell that has a clear effect and origin, such as a burning hands spell, provides no benefit.