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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 IconGrineerOn.png 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.png 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 (2017-03-24), 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.

IconCorpusOn.png Corpus IconGrineerOn.png Grineer Infestation w.svg Infested


Target Name Type Level Tile Set Mastery EXP Internal Name
IconGrineerB.svg Naga Rescue 30 - 34 Grineer Galleon 177 SolNode189
IconGrineerB.svg Berehynia Interception 30 - 40 Grineer Shipyard 50 SolNode185
IconGrineerB.svg Selkie Survival 30 - 40 Grineer Asteroid 177 SolNode187
IconGrineerB.svg Hydron Defense 30 - 40 Grineer Galleon 177 SolNode195
IconGrineerB.svg Rusalka Sabotage 32 - 36 Grineer Galleon 100 SolNode184
IconGrineerB.svg Adaro Exterminate 32 - 36 Grineer Asteroid 177 SolNode181
IconGrineerB.svg Charybdis Mobile Defense 34 - 38 Grineer Galleon 177 SolNode196
IconGrineerB.svg Marid Hijack 34 - 38 Grineer Shipyard 177 SolNode191
IconGrineerB.svg Kappa Disruption 34 - 38 Grineer Galleon 177 SolNode177
KelaDeThaym sigil b.png Merrow Assassination 35 - 40 Grineer Asteroid 177 SolNode193
IconGrineerB.svg Kelpie Spy 35 - 40 Grineer Galleon 177 SolNode188
IconInfestedB.svg Sangeru Defense (Dark Sector) 35 - 45 Grineer Asteroid 177 ClanNode15
IconInfestedB.svg Amarna Survival (Dark Sector) 35 - 45 Grineer Galleon 177 ClanNode14
IconGrineerB.svg Nakki Rathuum 40 - 40 Grineer Shipyard 177 SolNode190
IconGrineerB.svg Yam Rathuum 60 - 60 Grineer Sealab 177 SolNode199
IconGrineerB.svg Vodyanoi Rathuum 85 - 85 Grineer Sealab 177 SolNode183


  • 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.



Patch History[]

Update 30.2 (2021-05-12)

  • Swapped game modes of Kelpie and Kappa nodes on Sedna: Disruption <-> Spy. This moves Disruption off the main path forward to aid in New Player Experience.

Update 29.5 (2020-11-19)

  • Various fixes to lighting issues in Sedna skyboxes.

Update 27.2 (2020-03-05)

  • Optimized Hydron, Sedna to improve performance.

Update 25.7 (2019-08-29)

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