Nilfgaardian's wraith

The Nilfgaardian's wraith was the ghost of a former Nilfgaardian soldier who fought in Aedirn during the Second Northern War.

Biography
When he was still alive, the unnamed soldier was part of a detachment whose task was to hide a treasure near Flotsam. Eventually the soldier was captured by some Aedirnian scouts, who brought him in a nearby asylum where two medics named Rupert Brandhuber and Gridley interrogated him, learning thus the location of the hidden treasure. After the Nilfgaardian soldier drawed a map representing the treasure's location, he was finally killed. After his death however, the other inmates of the hospital started a revolt and the place was burned to the ground.