Right-click the Remnants of the Rift item in your inventory to begin. You will be taken to Martha Kiyen located at Northern Wheat Plantation. You can then choose which of the Blackstar quests you would to complete. In this example we will be walking you through the Armor questline since it has extra steps at the end, but both are very similar.
Next you will be taken to Star’s End to meet up with Martha and hand over the Remnants of the Rift.
Go to the marked location and interact with the two Black Meeorite located around Star’s End then go back to complete.
The next quest requires you to interact with the Cows nearby to collect their blood. Go back to Martha afterwards to hand it over and complete the quest.
Head over to Contaminated Farm now which is located just north of Calpheon. Speak to Gorgath and pick up the next quests. Use the chat option and select “Analyze the blood sample together” to complete and continue.
The next location is Caphras Cave which is located west of Florin. Go inside the cave into the secret part of the cave and interact with the Caphras Journal on the bookshelf above the ladder (on the right side of the cave).
You must then go back to Contaminated Farm to speak to Gorgath again. He will give you an item called “Eye of Anguish” which is required later on. At this point, the questline will also split into two and you can choose between the easy or hard route.
Choose the hard questline option. The easier questline will send you to Tarif and then give you a quest to kill 1000 monsters at Helms Post but will give you an easier boss in return. Choosing the hard option allows you to go straight to the Star’s End Brazier and will save you time. Once you are at the Brazier, create the Eye of Desolation. This is done by first Processing (L) > Heating, three base boss gear items. You can use any boss weapon or armor but it must be unenhanced. This will give you an item called Concentrated Boss Aura. Once you have 3 of these, use the Manufacture option to combine the Eye of Anguish and Concentrated Boss Aura to create the Eye of Desolation. This is used to summon the harder version of the boss which has a recommended AP of 260.
After defeating the boss, go back to the Brazier to complete then head to calpheon and speak to Dobart. He will then send you to Helms Post where you will complete the final part of the questline.
Head inside the cave at Helms Post and speak to Dorin Morgrim. Give the Blackstar’s Claw to him then use the chat option again. Interact with the Crystal Ball in the center of the room then speak with Dorin Morgrim again.
If you are doing the Blackstar Armor or Blackstar Helmet questline then you will now need to hand over the Specter’s Energy.
Finally, accept the last quest from Dorin Morgrim and use the chat option to hand over the Blackstar piece. Interact with the Crystal Ball again to craft the Blackstar gear then go back to Dorin to receive the forged Blackstar gear.