Osmium Mail

 is a technology in Age of Mythology that is exclusive to a Dwarven Forge, which in turn is featured in The Dwarven Forge, a mission in Fall of the Trident. Once it is researched, it adds a considerable hack armor bonus.

Effects

 * Infantry and Cavalry: -20% hack vulnerability.
 * All Heroes: -20% hack vulnerability

History
By mining the strongest ore and using special forging techniques that only the Dwarven forge offers, the Dwarves have perfected special armor to protect them during their constant struggle against giants in the Norselands.