Game of Thrones White Walker Sword

What is the coolest possible material a sword could be made of? Some people might think of gold gilded hilts, inlaid with jewels. A sword made out of a meteor would be pretty cool but we're wondering is it would actually be effective. We also like anything that's Goblin or Elvin made. All of these are pretty cool but nothing beats the sparkling wonder of the White Walked ice blade. The white walkers can create their swords from the cold weather around them so there's no worry about running out of weapons.  

While you might not want to be a part of the White Walker army, we understand why you'd want a white walker sword. It's forty inches long and made of a translucent plastic that's shaped like crystallized ice. Showcase it all year and be ready when it comes time to dress as these bone-chilling white walkers, you'll be ready!