History of City Gathering

City Gathering is a triumph from Destiny 2: The Final Shape: in the Pale Heart, collect resource nodes in The Lost City (progress is Materials 0/2).

How to complete

• Per a Bungie.net forum thread, Pale Heart resource nodes are called Stigma of the Witness; they look like a cactus with an orange glow and appear randomly around the map like chests. A Ghost mod that highlights nearby resource nodes shows them as small pyramid icons on the map.
• Go to The Lost City and gather two nodes.

Unconfirmed: the exact reward (a search snippet suggests a small Ghost reputation boost) and any seal; I could not open a page confirming either. TheGamer's Lost City guide lists feathers there but not nodes.