The Battlegear of Wrath is a very popular set in Warcraft, so much so that it got a Warrior Artifact, and A heroes of the storm Skin based off it.
Head canon: It was invented by gnomes. Why do I think this? Gnomes are the ones most commonly seen wearing it! Wrath is also in ‘Gnomeregan’ colors.
Fillet, Kneecapper Extraordinaire
Sonya (not a gnome)