The Black Breath is a grave and often even an incurable and fatal condition. Also identified as the Black Shadow, this condition is caused because of contact with Nazgûl. The Nazgûl also referred to as ‘The Ringwraiths’. ‘Úlairi’, the ‘Black Riders’ or ‘The Nine’; were the dreaded ring servants of the Dark Lord Sauron. The Black Breath was a form of a biological weapon meant to incapacitate the adversaries and was utilized extensively in the battle of Pelennor Fields.