Complete "Build Drakath's Armour" from /confrontation. For it, you need the items from the Requirements tab above plus:
Unidentified 13 x3
See the Reagent Library.
Treasure Chest x100
Drops from any enemy in the game with a 0.75% drop rate.
Face of Chaos
Defeat Drakath at /finalbattle. It has a 2% drop chance. This map has a limit of 1 person so you'll have to do this alone.
Join /hyperspace then walk into the left door. The code for the door looks like this. The item costs 3.75m Gold.
Dage's Scroll Fragment x13
Complete Loremaster Maya's "Embrace Your Chaos (Daily)" quest at /mountdoomskull. Complete it each day.
Once you're done, use the item you get to claim the armour from the Book of Lore in the Other Badges section. You can buy-back the Blade of Awe and Blinding Light of Destiny from your online account manager for free so don't worry.