Prismatic Fragments are how you unlock more of your potential in Destiny 2 using this subclass. The Facet of Dominance is one of the more complicated Fragments to unlock, as it requires a few extra steps that you might not expect to go through.

You’ll want to make sure you do a few things before you go hunting for this fragment. One important consideration is to make sure you’ve completed Destiny 2’s The Final Shape campaign. Many of the other Prismatic Fragments also have this requirement, but there are a handful that you can grab before you reach this point. For now, we’ll focus on the Facet of Dominance and adding it to your Guardian’s arsenal.

You can obtain the Facet of Dominance by working your way through the Micah-10 missions that you receive after completing The Final Shape campaign in Destiny 2. You can speak to Micah-10 in The Lost City, where there is a transmission table that you can use to converse with her. She'll send you a handful of Lost Ghosts to find, such as the Convalescence Underbrush or Convalescence Rootbound. Focus on these missions and then Micah-10 will have the Alone in the Dark missions for you to complete.

The Alone in the Dark quest unlocks the Cyst missions on your map. You can complete these repeatable missions, completing specific objectives while defeating powerful enemies. When you defeat these enemies in Destiny 2, they will drop Memory Vestige: Light. Keep working your way through the Cyst missions for these items if you don't have enough.