The Eye of Odin is an artifact, owned by the Norse God, Odin, in the Gargoyles' Universe. It's power was lusted by many villains, including the Archmage, in order to restore his youth. Many villains tournaments focus on the Eye of Odin, since it's significance to the story, affects other characters' personalities.
Disney Vs Non Disney Villains War
Pre War: The Search for the Eye of Odin
The Eye of Odin is mentioned by the Archmage to the Huntsclan, before the events of the first war would occured. Destane, the Archmage's alter ego, orders from the Huntsclan to retrieve the Eye of Odin for him. Unfortunately, Destane perishes in a conflct with his apprentince, Mozenrath, leaving no other info for the Eye of Odin.