Ashbringer

The Ashbringer is a powerful sword named for its ability to slaughter the undead and leave nothing but ash in its wake. The legendary sword was crafted by King Magni Bronzebeard on the Great Anvil of Ironforge, and was infused with the Holy Light. It had become a thing of legend and shares its name with its original wielder, Alexandros Mograine, the former Highlord of the Order of the Silver Hand who employed the title of "The Ashbringer".
When Alexandros' oldest son, Renault Mograine, betrayed and murdered him with the holy sword, this act of anger and betrayal transformed it into the Corrupted Ashbringer. The Archlich Kel'Thuzad then resurrected Alexandros as a death knight to lead the Four Horsemen of the Scourge in Naxxramas. The undead Alexandros continued to wield the Corrupted Ashbringer, until his younger son Darion Mograine killed him and reclaimed the unholy blade. Discovering that his father's soul had become corrupted and trapped in the sword, Darion plunged Ashbringer into his own heart to free Alexandros through an act of love and sacrifice. Later, Darion was similarly resurrected as a death knight, and continued to wield the corrupted sword as the Highlord of the Death Knights of Acherus. During the Battle for Light's Hope Chapel, Ashbringer was eventually purified when Darion betrayed the Lich King and relinquished the sword to Tirion Fordring. Wowpedia - 
==External links and references==