Honkai: Star Rail Sunken Lethe Mission Progression Guide

To progress through the "Sunken Lethe" Trailblaze Mission in Honkai: Star Rail, speak to present characters before touching puzzle objects, manually scan rooms for visual memory distortions, and check internal monologue entries in your quest log whenever an objective marker disappears.

Step-by-Step Area Exploration Sequence

When entering a new room or dreamscape sub-area, follow this sequence to avoid missing triggers:

1. Speak to Present Characters: Initiate conversation with any character in the scene before interacting with room objects. Dialogue frequently contains context required to understand puzzle hints.
2. Scan for Faded Memory Nodes: Manually look around the area for visual distortions. Memory nodes do not always display automatic waypoint markers.
3. Activate Environmental Objects in Order: Interact with puzzle components strictly in the order indicated by your mission log. Activating objects out of sequence can obscure required dialogue triggers.

Resolving Progression Roadblocks

If your objective marker disappears or the current goal becomes vague, perform these troubleshooting checks:

• Inspect Room Edges: Search the corners and outer edges of the map. Critical memory nodes can be placed along room peripheries, particularly in zones with heavy visual lighting effects.
• Check the Quest Log: Re-read the latest quest log update. The game uses internal monologue entries to indicate which character's perspective governs the current path forward.
• Verify Dream State or Viewpoint: If the area allows switching between character views or dream states, ensure the active state matches the current objective requirements.
• Backtrack to the Zone Entrance: Return to the starting node of the current zone. Interacting with an early node a second time after a dialogue segment often unlocks the remaining puzzle pieces.