Hidden Knowledge is a suit of Scout Armour belonging to the Blood Ravens chapter. It was re-crafted in 830.M39 by Blood Ravens artificier Idris Reif, who forged the ceramite plates in such a way that they would interlock and add stability for firing ranged weaponry.
During the Aurelian Crusade, the armour was available to Scout Sergeant Cyrus.
See also
Source
- Warhammer 40,000: Dawn of War II (wargear selection screen)