If there are new discoveries to make or ancient tools of war yet to be excavated, the Grineer want to be there first — at the frontier of space exploration. Always seeking the upper-hand against their foes, they have numerous deployments that border the known reaches of our solar system, poised to enter brave new territory and unexplored space on command.

—Sedna Fragment

Sedna is a dwarf planet where the Grineer are the controlling faction.

Sedna becomes accessible by defeating the Specter in the Sedna Junction on Pluto after completing the required tasks.

The Assassination Target on this dwarf planet is Kela De Thaym, who is located in the mission node Merrow and where the blueprints for the parts of the SarynIcon272 Saryn Warframe can be obtained. Uniquely, in order to access the Kela De Thaym boss battle, players must accumulate sufficient Judgement Points by playing the various Arena missions on Sedna. As of Update 20.0, 25 Judgement Points are required to access the boss battle, with 12 being expended each time a player is successful in defeating Kela De Thaym.

Sedna does not currently have a Tenno Relay.


Invasion Missions: The Corpus will appear as a "Sideable or Opposing" faction while the Infested will always appear as an "Opposing" faction during Invasion missions.

Spy Missions: Special enemy variants have a chance of spawning during Spy missions.

Survival Missions: The following lists below do not apply to Survival missions.

Corpus Grineer Infested


Target Name Type Level Tile Set
IconGrineerB Naga Rescue 30 - 34 Grineer Galleon
IconGrineerB Hydron Defense 30 - 40 Grineer Galleon
IconGrineerB Berehynia Interception 30 - 40 Grineer Shipyard
IconGrineerB Selkie Survival 30 - 40 Grineer Asteroid
IconGrineerB Adaro Exterminate 32 - 36 Grineer Asteroid
IconGrineerB Rusalka Sabotage 32 - 36 Grineer Galleon
IconGrineerB Marid Hijack 34 - 38 Grineer Shipyard
IconGrineerB Kappa Spy 34 - 38 Grineer Galleon
IconGrineerB Charybdis Mobile Defense 34 - 38 Grineer Galleon
KelaDeThaym sigil b Merrow Assassination 35 - 40 Grineer Asteroid
IconGrineerB Kelpie Disruption 35 - 40 Grineer Galleon
IconInfestedB Amarna Survival (Dark Sector) 35 - 45 Grineer Asteroid
IconInfestedB Sangeru Defense (Dark Sector) 35 - 45 Grineer Asteroid
IconGrineerB Nakki Rathuum 40 - 40 Grineer Shipyard
IconGrineerB Yam Rathuum 60 - 60 Grineer Sealab
IconGrineerB Vodyanoi Rathuum 85 - 85 Grineer Sealab


  • Due to Sedna being the second planet to feature the Grineer Shipyard tileset, it is also the only planet besides Ceres where Grineer Drudge non-combatants can be encountered. These are non-hostile until they are attacked and damaged, in which case they will attack with their various tools.
  • Due to the Grineer Shipyard tileset, this is also the second location beside Ceres where Guardsmen and their Eximus variant, the Prosecutors can be found.


Media Edit

Patch HistoryEdit

Update 27.2
  • Optimized Hydron, Sedna to improve performance.

Update 25.7

  • Kelpie is now a Disruption node.
  • Moved Sabotage from Kelpie to Rusalka to replace Capture

Start a Discussion Discussions about Sedna

  • Worst Moment in Warframe

    156 messages
    • corpus invasion mission, portal bugs our and keep respawning u before the portal...rinse reapeat automatically, need to xit warframe just to get free
    • Lexmechanic wrote:Ran a mission with a Nova squadmate who placed a wormhole from the entrance of the extraction room to the back wall. Every...
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