Eris

"Rapid Corpus expansion has led them to build outposts in this far flung sector of the system."

- In-game description

 is a planet where the Infested have taken over the planet as of Update 14. Prior to the update, the Corpus were the controlling faction.

The Eris Nav Segment can be obtained by defeating Tyl Regor located on Titania, Uranus.

The vital target of this dwarf planet is Mutalist Alad V, though he isn't located in a mission node. In order to fight him, players need to craft the Mutalist Alad V Assassinate Key with the blueprint awarded from the Patient Zero quest. The parts of the Mesa Warframe can be obtained from him.

The Kuiper Relay was located here, but it was the third player hub destroyed by Vay Hek's Balor Fomorian in the Eyes of Blight event.

Enemies
''Infested can appear during Invasion missions. These lists do not apply to Survival missions.''

Tips

 * As of Update 14.1.2, Eris can now drop Mutagen Samples.

Trivia

 * Eris is named after the Greek Goddess of discord, owing to the fact that its discovery led to the debate (and ultimately the demotion) of Pluto's status as a planet.
 * Many of the Eris' missions are shortened names of various diseases, parasites and fungi.
 * After The Hunt For Alad V Eris was the only planet left to be completely controlled by the Infested, but they were eventually replaced by the Corpus in Update 11.3.0, but the Infested regained control in Update 14.
 * According to the Operation Oxium Espionage event, the formulation for Oxium was developed in a research facility near Eris.
 * Eris is the only planet that hosts the Hive Sabotage mission type.
 * Eris is also the only planet to feature the Infested Ship Tileset.
 * Until Update 15.2.2, the Viver node was a Corpus Interception mission, making it the only non-Infested mission on the planet. This has since been replaced by an Infested Hive Sabotage mission.
 * Phorid originally was the boss of Eris, located in Naeglar until Update 11 when it was relocated to inhabit Invasion missions, and only when they reach the planet's boss level.
 * As of Update 15.5 Mutalist Alad V is the boss of Eris prior to that this was one of two planets to not have a Boss mission, the other being Earth which does not have a boss node.
 * Eris possesses the most missions of any planet.

Eris Эрида