Marak-Ais Blade

"Marak-Ais is perhaps the oldest artifact in our collection. It dates all the way back to the Mythic Age, when the first hero used it to slay the High Lord of House Arkon, and bring an end to the Ragnarok War. If you believe the stories at least,"
-Maria Von Der Mosel
Marak-Ais, also known as the Blade of Neriss, Lightbringer, the Holy Blade of the Order of the White Cross, and to those who hate it as Axios's Dick, is the legendary blade of the first hero, who used it to bring an end to the Ragnarok War. The blade is known for its immense power, and its ability to completely mute any and all dark magic around it. It is also known for being a living, choosy weapon that will only display its full power when in the hands of one who it deems worthy. 
Many people have wielded the blade over the years, the most recent being the founder of the Order of the White Cross, Jackson Brown. The agency he helped found is actually named after the blade, which is known for its immensely rare, warm-white divinite alloy, and cross-shape.