have you heard of the Sword of Khaine from Warhammer? Also known as the Widowmaker? the Godslayer? the Doom of Worlds? the Spear of Vengeance? it is a blade forged from the SHARD of a weapon made for the elven god of war Khaine. I'm cheating slightly since it has no fixed shape. It's been a sword, but it takes whatever form best fits its user. It is said that the sword is always hungry for the destruction and blood of others, exerting its influence and appearing in the dreams of all the Elves. It goes beyond being a weapon and turns into a fucking force of nature. many elves won't even speak of it by name.