After 27 hours, Bungie relented, “decoupling” the puzzle challenge from the Forge unlock which they just opened up, and players are now free to farm the final forge and can acquire the last two exotics it was hiding. The difference here is that the Bergusia forge is 650 power instead of 625, so it’s tougher than the others. It’s not the hardest exotic quest ever, but it’s lengthy and gets somewhat difficult by the end, depending on your level and your familiarity with a few past activities. Step 4: This will allow you to finally open the mystery box, but there’s still more to go as this goes from a key quest to a full exotic quest now. Step 7: Then you’ll have to fight Siviks in the Bergusia forge, the Fallen troll from the puzzle room who kept appearing and disappearing.

Source: Forbes January 10, 2019 13:20 UTC