The Dauthdaertya are twelve weapons created towards the end of Du Fyrn Skulblaka by the elves. They were forged using incantations, forgotten by the time of the Rider War, and with materials that the elves no longer remembered how to manipulate by the time of the Rider War, with the sole purpose of killing dragons. This made the Dauthdaertya along with their wielders nearly impervious to magic, including the magic of the dragons. The elves believed that all twelve Dauthdaertya were lost or destroyed after the pact was made between the elves and dragons. All of the Dauthdaerya were all named after beautiful flowers, although Arya commented that anything used to kill a dragon is in no way beautiful. Saphira was nearly killed by a spear of this kind during the Battle of Belatona. The Dauthdaert, Niernen or "Orchid," was speculated to be the last surviving weapon of the twelve. Arya later used Niernen to kill Shruikan by stabbing him through the eye.
Niernen is a long lance/spear, with its head made in a barbed pattern that would be unusual to those used to normal human spears. Its most noticeable feature is that it is surrounded by an emerald glow. The weapon itself is also of a green hue.