History of Fallen Shield

The Fallen Shield is an encounter in the Grasp of Avarice dungeon, and it is where the third Gjallarhorn Catalyst chest is found. Guardians get an engram from a Fallen Vandal above a waterfall, then climb the central building to reach the chest. The catalyst chests only open while a player has at least one stack of the Burdened by Riches debuff, and they do not spawn unless someone in the fireteam owns Gjallarhorn.