Armory shield upgrades affect the pierce armor of all human soldiers, Heroes and ships: those trained at the Academy, Barracks, Longhouse, Dock, Migdol, Fortress or Hill Fort. They do not affect myth units or siege weapons. Pierce armor protects a unit against pierce attacks, which are generally ranged attacks such as arrows. The armor percentage is the amount by which the attack is reduced.

Norse mythology is full of dragons, from Nidhogg beneath the world ash, to Fafnir who was killed by Sigurd, to Grendel who was killed by Beowulf. Dragons were associated with water, and often lived in seas, misty lakes, storms or fogs. Sometimes they lived deep in underground caverns. The Norse people adopted the totem of the dragon to protect many things, including the prows of their ships and names of their towns.