Before the story of the Wanderer begins inDiablo 4, Lilith is summoned back to Sanctuary by Elias. This event sets into motion the story of the game, as you and your allies chase Lillith and Elias around to various locations, trying to stop their plan.
Related:Diablo 4: Turbulent Waters Quest Walkthrough
In the To Walk a Dark Path side quest chain, you can learn a bit more about how Lilith was summoned to Sanctuary. This chain is comprised of four quests, ending with By Three They Come, which we will take an in-depth look at below, including how to start it and how to finish it.
How To Complete By Three They Come Quest
By Three They Come is thefinal questin theTo Walk a Dark Path quest chain, and isautomatically acceptedafter completing the previous quest,Turbulent Waters.
To start,meet with Sev to the west of Backwater. The closest Waypoint is the one inVyeresz, which will be accessible if you’ve cleared the Stronghold here. Once you’ve reached Sev’s location, talk with her to get her to accompany you.
Next, travel a bit more west to theEsret Chapel. When you arrive, Sev will leave your company and the mini-dungeonHalls of Dark Portentwill become available. Enter this dungeon and make your way through, killing enemies that get in your way.
Eventually, you will make it to anEngraved Stone Door. As you start to attack this door,Ghouls will ambush you. Fend them off to resume damaging the door. This will occurtwo more times; fight off each wave of Ghouls as they appear. Soon, you willdestroy the Engraved Stone Door, permitting you entry into the next area.
Behind the door is theBlood Echoboss. This boss functions almost exactly the same as theBlood Bishopboss that you may have encountered in other dungeons like Akkhan’s Grasp or Hallowed Ossuary.
The main thing to keep in mind during this fight is the boss’s ability tograb and hold you in place, dealing constant damage. Havingan ability that can make you Unstoppablewill help you escape this dangerous attack.
After defeating the boss,inspect Symon’s corpseand read the Tattered Journal that he drops.Travel back to Zarbinzetto relay everything you’ve learned toFather Dymus, and this quest will be complete. In addition to the normal quest rewards of gold, experience, and Renown, you’ll also gain the’Pale Harbinger’title.