Stormblade

=== Stormblade belonged to Grimbeard the Ghastly, Legendary Pirate and King of the Vikings but later in the series the sword was taken by Alvin the Treachours and used to kill Hiccup in How to Break a Dragons Heart===

Use in the Book
===Storm Blade makes a reapearence in How to Break a Dragons Heart, it is used to try and kill Hiccup at the burning bridge, it is unknown if Stormblade had been melted in the lava or survived with Alvin and his witch of a mother===