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Faction Khitomer.png The Power Source
URLavaTubes 1024x576.png
Cooldown Timer:
Preceded by:
“Latest Findings”
825 Expertise icon.png

In The Power Source, the player has to shut down a power source in Tholian-occupied volcanic caves under the Hwael Ruins.

The player must complete (or replay) this mission in order to gain access to the Underground Ruins, which is required in order to complete “Secrets of the Ancients”.


The player and their away team enters the Underground Ruins (as requested by D'Tan in “Latest Findings”) and studies geological instabilities, Dewan artifacts, and Tholian equipment. Eventually they reach the end and must shut down the ancient Dewan power plant before the Tholians inadvertently trigger another seismic event.


Mission Text[]

<Rank>, we've detected a power source under the Hwael Ruins.

The location is a series of lava tubes that lead to an underground volcano, but the energy readings are not geothermic in origin. We need to learn more, but the mineral content of the lava tubes is affecting our sensors, and a probe simply won't be able to do the kind of tests we need.

I know it's dangerous, but would you be willing to explore the area? You and your team will need to use environmental suits – the heat and pressure would be too much for anyone but a Tholian.


Investigate the Underground Ruins.


  • Explore the Lava Tubes Under the Hwael Ruins
  • Underground Ruins
    • Read Mission Briefing
    • Investigate Lava Tubes
    • Take and Activate EV Suits (or Activate Your Own)
    • Scan Geological Instabilities (5/5)
    • Scan Mysterious Artifacts (3/3)
    • Shut Down the Power Plant
    • Prevent Power Plant from Overloading
    • Defeat the Tholian Captain




  • Romulan Civilian


There are no accolades specific to this mission.


For a walkthrough of this mission, visit the Walkthrough page.


A map of Underground Ruins. - Click to Enlarge.



  • This mission was once only available to players who have completed Tier 4 of the Romulan Reputation System prior to the Agents of Yesterday Artifacts update.
  • Preventing the power station from overloading will result in a bonus of Romulan Marks.
  • Tip: DO NOT exit the Cave when the mission is complete. Turn in the mission and pick up the next one "Secret of the Ancients". Signal D'Tan, File the Report, then exit the Cave.
Faction Romulan Republic.png New Romulus Missions
Storyline Missions
“New Romulus Aid”“Staging Area”“Warehouse”“The Atlai”“Vastam Peaks”“Mountain Base”“Paehhos Crater”“Overgrown Caves”“Hwael Ruins”“The Power Source”
Daily Missions
“New Romulus: Isha Forest Epohh Collection”
Faction Romulan Republic.png Reputation System Missions
Reputation Cutscene Missions
“Hidden Camera” (Tier I)“Secret Shuttle Codes” (Tier II)“Web Access” (Tier III)“Latest Findings” (Tier IV)“Secrets of the Ancients” (Tier V)
Faction Romulan Republic.png Duty Officer Assignments
“Research History of New Romulus”
Epohh Collection: “Research Tagged Epohhs”“Raise Epohh Pup”“Raise Epohh Moppet”“Raise Epohh Adult”
v · d · e
All Starfleet Factions Starfleet-only
Faction KDF.png Klingon Defense Force-only
Faction Romulan Republic.png Romulan Republic-only
Faction Dominion.png Dominion-only
Faction Khitomer.png Cross-faction
Mission available Side Content: The Galaxy at Large
See also: Featured episodePatrolRemoved MissionsTask Force Operation