Shadowdancing

Either:
1. A magic or technology developed by The Empire of Coraar 'ath Revaar during the Elven/Infernal war which ultimately won the war. (Note by D.A. - our only source for the details in this data is Awarth who could be considered biased or unreliable)
or
2. A state discovered by Dalitar Amakiir in his research on the link between a Shadow and a person, which he can use to augment his combat abilities, or run really fast to be on time to class.
Unclear so far how much the two have in common, however the Keeper we encountered seemed to recognise either Thorn or the Shadowdance and commented on it being a Bad Idea^TM, but what does he know anyway.