Destiny 2: The Witch Queen Memory Alembic Guide: How To Find Qualichor And Finish The Secret Mission

gamespot.com:

Explore Savathun's throne world in Destiny 2: The Witch Queen for a while and you might stumble upon some special, glowing Hive enemies, or investigate the curious corpse of a dead Scorn chieftain. These interactions, if you complete them, will eventually lead you to a special secret mission called Memory Alembic. Completing it is necessary to unlock all the secrets in the throne world and complete the Witch Queen's Triumph seal, but you'll have to puzzle out how to go about it on your own.

Or, you would have to puzzle it out, but we're here to help. Though the Memory Alembic mission is obtuse, solving the case of the dead Scorn isn't too difficult once you know where to look for clues. The mission will have you hunt down and destroy several special Hive Executioner enemies, which earns you a Triumph and a special resource called Qualichor. You need a fair amount of Qualichor to advance the quest, and it's not immediately clear how to get it.

Below, you'll find everything you need to know about Qualichor, Hive Executioners, Hive Inquisitors, and the Memory Alembic quest to complete it.

First, you'll need to increase your reputation with Fynch in Savathun's throne world in order to unlock Deepsight Tier 2. Without it, you won't be able to see some key secrets or advance the quest reliably, so keep completing bounties, patrols, and Public Events in the throne world to level up.

Once you're at Deepsight Level 2, start looking around the various patrol areas of the throne world for Deepsight nodes and interacting with them. While most of them will lead you to a nearby chest with some Glimmer, a weapon drop, and a little bit of throne world reputation, you'll eventually find one that reveals the nearby body of a Scorn