A Colossal Problem

Event: A Colossal Problem is an event quest in the Fallout 76 update The Legendary Run.

Stage 1
As soon as a nuke is dropped on the mine, the thirty-minute event timer starts. One can join the event and is subsequently teleported into the mine's interior. From there, the player character has five minutes of time to prepare for the fight.

It is possible to repair, modify, or craft equipment here using workbenches placed both at the entrance and in the large cavern after the tunnels. Several notes and a holodisk can be found with a little exploration and a total of three wendigo spawns can be killed. After the time has passed, the rubble on the right-hand side of the large cavern will collapse, allowing for a further descent into the mine.

Stage 2
After dropping down the now-accessible mine shaft, investigating the noise will result in finding Earle Williams, who has transformed into a wendigo colossus. He has a large amount of health and will mutate once his health is low enough, about 50% depleted like with all legendary enemies, especially the Scorchbeast Queen.

The fight itself consists of avoiding Earle, killing off the waves of wendigo spawns that Earle attracts, evading the ranged attacks, and evading the burning embers that drop down from the cave's ceiling during the later stage of the fight. Dying during the fight results in respawning in the large cavern with the previously blocked mine shaft, dropping down said shaft again allows for a quick return to the action. Don't forget to grab any loot that was dropped when killed, it can't be recovered once a player character escapes the mine until the quest is triggered again.

Should time run out and Earle is still alive, one fails the quest and gets teleported to the Monongah Mine exterior, resulting in no rewards whatsoever and skipping the next stage.

Stage 3
After Earle has been defeated, the mine will start collapsing, giving a two-minute window to make the escape. Earle can be looted before heading up the sloped tunnel marked by an "EXIT" sign and warning lights, killing any wendigo spawns and auto-miners on the way out, or just outright outrunning them due to the tight time limit. Exiting the mine will conclude the quest, awarding experience, and loot. If Something Sentimental is still an active quest, Earle's pocket watch will be found on his remains, allowing the quest to progress further.

Behind the scenes
Victoria McCreary was the main quest designer for the event.