How to start & complete the Hundredfold Path Quest in Destiny 2?

If you're diving into Destiny 2's latest Episode: Heresy Act III, you've probably heard about the Hundredfold Path quest. This quest ties into the Barrow-Dyad SMG, one of the most talked-about Exotics in Episode: Heresy Act III. To even begin, you’ll need this bad boy in your inventory—no exceptions. Once you’ve got it, you’re set to dive into the Sunless Cell Strike to kick things off. Here’s how you can start it.
First things first, if you don’t have the Barrow-Dyad, you’re not getting anywhere. This Exotic SMG is your golden ticket to the Hundredfold Path quest. Keep it in your inventory, or better yet, have it equipped—it’s going to be important.
Now, for the real fun. You need to complete the Sunless Cell Strike while keeping the Barrow-Dyad equipped. Here’s what you need to know:
Once you defeat the final boss, you’ll be rewarded with an item called Trembling Osseous Spine. This is the key to unlocking the quest.
With the Trembling Osseous Spine in your inventory, head over to Eris’ flat in The Last City. There, you’ll find the Slab, which is your go-to for picking up and progressing various quests.
But wait—there’s more.

Now comes the grindy part. The quest asks you to hunt down 10 Tithing Wormspawns in The Nether. These little guys are white Worms that appear after you switch the Slab to the Light/Ambition path. If you're not sure where to look, just keep your eyes peeled in the Nether—these things aren’t too hard to spot.
Yeah, you’re heading back into Sunless Cell—but this time with a little twist. You must complete it using a high rate-of-fire weapon alongside your Barrow-Dyad.
Once you take down the boss with the right weapon loadout, you’ll wrap up the quest.
That’s it! Once you complete the Strike with the right weapons, you’ll wrap up the Hundredfold Path quest and unlock the Exotic Catalyst for the Barrow-Dyad SMG. Now, go flex on your fireteam with that upgraded firepower.