Paintball Gun gate
Opticus’s trial is a survival encounter. Stay alive until Ultimate Overseer, then finish his reward dialogue. The field puzzles after the tower use the Paintball Gun; a Slingshot card is not the replacement tool.
Trinity districts
Follow Cassie’s route through Redcliff, Robur’s court and Azuri’s puzzle for the shards. After she runs ahead, return to the coronation room for the council battle guarding the Seventh Sanctum.
Optional Brigand’s Sword return
The upgraded sword opens the barred Red Room in the normal Manor, where Mutant waits. This is a return to a previous chapter’s location, not a required boss after Frostmaw.