Sword of Sin

Origin
The Sword of Sin along with its sister sword, Sword of Salvation was used by the Order of Purity's Azrael since Geoffrey de Cantonna first donned the Suit of Sorrows after the Crusades. The Sword of Sin was retained by the Order of Purity even after the Sword of Salvation and the Suit of Sorrows was lost to Ra's al Ghul, a long time rival of the Sacred Order of St. Dumas.

Links

 * http://dc.wikia.com/wiki/Sword_of_Sin
 * http://www.comicvine.com/sword-of-sin/18-56031/