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
GrineerMissionIcon Naga Rescue 30 - 34 Grineer Galleon
GrineerMissionIcon Berehynia Interception 30 - 40 Grineer Shipyard
GrineerMissionIcon Hydron Defense 30 - 40 Grineer Galleon
GrineerMissionIcon Selkie Survival 30 - 40 Grineer Asteroid
GrineerMissionIcon Adaro Exterminate 32 - 36 Grineer Asteroid
GrineerMissionIcon Rusalka Sabotage 32 - 36 Grineer Galleon
GrineerMissionIcon Kappa Spy 34 - 38 Grineer Galleon
GrineerMissionIcon Marid Hijack 34 - 38 Grineer Shipyard
GrineerMissionIcon Charybdis Mobile Defense 34 - 38 Grineer Galleon
InfestationMissionIcon Amarna Dark Sector Survival 35 - 45 Grineer Galleon
InfestationMissionIcon Sangeru Dark Sector Defense 35 - 45 Grineer Asteroid
GrineerMissionIcon Kelpie Disruption 35 - 40 Grineer Galleon
GrineerMissionIcon Nakki Arena 40 - 40 Grineer Shipyard
GrineerMissionIcon Yam Arena 60 - 60 Grineer Sealab
GrineerMissionIcon Vodyanoi Arena 85 - 85 Grineer Sealab
KelaDeThaym Merrow Assassination
(Kela De Thaym)
35 - 40 Grineer Asteroid


  • 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

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