|Previous Owners||Berk Dragon Training Academy, Viggo Grimborn|
The Dragon Eye is a mysterious foreign artifact found hidden in the partially-sunken ship The Reaper within the Ship Graveyard.
The Dragon Eye is a kaleidoscope/cryptex-like device with a set of lenses built into the center. The nozzle itself is lined with differently-labeled buttons, each of which reveal different parts of the lenses' contents. The glass that projects the light (the color of the light depending on the flame used to project the symbols) is held in place with a cuff shaped like a dragon's head. On the side of the tube has a lock that keeps the Dragon Eye inactive, only unlock-able with a Snow Wraith tooth. This mechanism can be overridden should the lock be exposed to Flightmare venom.
LoreEditThe exact origins of the Dragon Eye is currently unknown, but it is presumed to be from just outside of the Archipelago given the information of foreign and local dragons, as well as the foreign language it has inscribed. It is also considered to be very valuable to its original owners, the very ship booby-trapped every step of the way and the ship's captain. It is revealed that the Dragon Eye was originally owned by the ancestors of Viggo and Ryker's tribe. If it ever had an original name, it is now lost, as Viggo accepts the name Hiccup gave it.
Much like the Dragon Manual, the Dragon Eye is a tool used for recording information of dragons, as well as maps to various secrets, one of which being maps to lenses that can be used by the Dragon Eye itself. In order to be used, the Dragon Eye's receptacle must be placed in front of a slow-burning dragon's flame (or in a changewing's case, the glow of changewing's acid) where it then projects the contents of the lenses onto a nearby surface. Certain lenses only work when under the glow of a specific dragon's flame or excretion, as one of the lenses only operated when under the glow of the changewing.
When Viggo gave the Dragon Eye back to Hiccup, so he could gain his trust and then later captured and held Astrid hostage to get it back; Hiccup throw it into the volcano on the Edge. So the knowledge it carries could no longer be used to harm anymore dragons and to end the feud over it; however Viggo's urge to get it back caused him to fall into the volcano.
Role in the CrossoverEdit
The Dragon Eye is shown to be mysterious in origins and function, so the idea that the Dragon Eye could contain information/properties/etc. involved with the other cultures or magical aspects of the fandom is very likely.