Rathuum

 is a Grineer Arena mission hosted by Kela De Thaym on Sedna which pits Tenno against Kela's Executioners to earn the Judgment Points necessary to face Kela herself.

Missions
There are three Rathuum nodes on Sedna. Higher level nodes award more Judgment Points on a successful completion, but also require a minimum number of Judgment Points to enter. If a mission requires Judgment Points to enter, all players in the squad must meet the requirement.

Judgment Points cannot be lost in the arena. The only way to lose judgment points is to successfully defeat Kela De Thaym. Entering Merrow, Sedna to fight Kela requires 25 points, and upon completion of the mission all players in the squad will lose 12 Judgment Points.

Modifiers
Each Rathuum fight includes one of the following random modifiers, all of which either hurt the Tenno or help the Executioners:

The Executioners
The Executioners are the players' key enemies in Arena. Players must get 25 kills before the Executioners do. Regardless of Cell size, the Executioners will always outnumber the players by one member.

Each Executioner has their own set of tactics and equipment, whether it is Gorth soaking up damage or Olka Harkonar providing long-range support. Thus, players must be aware of who they're facing to maximize their kills while minimizing casualties.

Rewards
Upon completion of a Rathuum mission, the players will receive a reward depending on the node completed. Most of the time the reward will be either a Credit Cache or Endo, but on rare occasions players can receive a rare mod or a Forma Blueprint instead.

Tips and Tricks

 * Many Executioners regularly drop Endo, making Rathuum a decent place for sufficiently powerful players to quickly farm Endo.
 * All Executioners are vulnerable to finisher attacks from Ash's Fatal Teleport augment. In combination with a dagger equipped with the Covert Lethality mod, this will allow players to kill any Executioner in one hit regardless of arena modifiers or level.