History of Blighted Demolition

'''Blighted Demolition''' is a Pale Heart Pathfinder triumph from Destiny 2: The Final Shape. Complete the Expunging public event in The Transgression.

How to complete

1. Travel to The Transgression in the Pale Heart.
2. Interact with the treasure chest to start Expunging.
3. Stand on the glowing well of Light with the floating Grenade symbol and do not leave it, or the event fails.
4. Destroy every cyst growing on the hands and arms around you with grenades.

Tip: use a grenade that sticks or detonates on impact; bouncing grenades like the Suppressor Grenade can miss cysts hanging overhead.

Rewards

One source lists a Ghost Reputation Increment as the reward (a search summary of light.gg, which could not be opened directly).