Soulstice Echo Memories are sub chapters that give some backstory for both Briar and Lute. The third memory gives some more insight as to how the sisters survived their encounter with a Wraith when their village was attacked. Lute enters Briar’s subconscious once more to find a way to help her sister stop her rampage.
This chapter picks up from when Briar suddenly went berserk after defeating the Weavers, and Donovan jumped in to subdue her.
Similar to before, you will be able to control Lute as she locates the echo memories inside Briar’s subconsciousness. You can use the pulsing cone underneath Lute to locate where the echoes are. Once you find one, use her Evocation Field and interact with the echo to reconstruct it and watch the cutscene.
There are three echoes to find in this chapter. Afterwards, another cutscene will play with Briar trying to get out of her restraints.