Once you’ve accepted and completed the previous mission Discover the Trial of Supremacy, head further into Hall of Obsidian and speak with the Overseer to begin the challenge.

What are Eridian Proving Grounds?¶

Once you’ve completed the main story of Borderlands 3 you’ll be able to unlock six Eridian Proving Grounds by interacting with pedestals that are scattered in different locations around the galaxy. These missions have you going to different variations of previous zones within Borderlands 3, where you’ll have to take out different types of enemies across two to three areas until you’re greeted by a boss at the end.

General Tips¶

• Have a good build

You’ll be able to take on these Eridian Proving Grounds pretty easily without having the greatest build but if you’re someone that likes to complete all of the optional objectives, you’ll need to have an exceptional build set up so you can pretty much one shot most enemies in order to complete the mission within the 25 minutes.

• Upgrade SDUs

Before attempting these Eridian Proving Grounds you’ll want to make sure you’ve taken some time to upgrade your SDUs, as you’ll constantly be throwing grenades and using alot of ammo to take down the Badass enemies.

• Level up your Survior Tree

You’ll also want to make sure you take some time to farm up some Guardian Rank Token until you gain the Resilient perk from the Survior tree, which will allow you to revive from Fight For Your Life with full health and shields.

Enter the Trial¶

Accept the challenge by speaking with the Overseer and then enter the now open area to begin slaying the enemies.

Kill All Enemies / Continue Trial¶

After you’ve entered the trial you’ll face alot of enemies that include all of the enemies you fought on Nekrotafeyo such as Dark Maliwan Soldiers and Eridian Guardians. When fighting against the Dark Maliwan, focus your attention on the NOGs to prevent them from healing their allies and then take out any Heavies that may be present. As for the Eridian Guardians, focus on any Heralds that may spawn, these are by far the most deadly of the bunch and then focus your attention on the Seras in the air. Like always when dealing with Guardians, use a Shock weapon to make quick work of them.

Find the Fallen Guardian (Optional Objective)¶

On your adventure through the area taking out the enemies, pay close attention to the end of the areas where the walls with the forcefield is blocking your path. A Fallen Guardian can spawn at any point near that area, which will drop a good amount of loot and cash if killed.

Optional Objectives¶

During these Eridian Proving Grounds you’ll be given four different Optional Objectives that you can challenge yourself to complete.

• Find the Fallen Guardian (Optional)
• Complete Trial without Dying (Optional)
• Kill Boss with 25:00 Remaining (Optional)
• Kill Boss with 20:00 Remaining (Optional)

Some of these objectives are pretty tricky if you arent well equipped with a decent build and good weapons, but dont worry if you’re are unable to complete these tasks as they only reward you with extra cash and XP at the end of the mission.

Boss: Sera of Supremacy¶

Once you’ve cleared all the enemies out of the previous areas you’ll eventually come to an area where you’ll have to drop down to go head to head with Sera of Supremacy, the boss of this Eridian Proving Ground.

Being a Sera type Eridian Guardian, you can expect this boss to take to the skies constantly. A Shock weapon is essentially here as you’ll only need to deal with an Eridian Guardian’s Shield to defeat them. Sera of Supremacy attacks by launching Orbs of Eridian or Radiation at your position, this can be easily avoided by backing up. Once you deplete two full life bars, the Sera of Supremacy will fall, completing the trial.

Open the Chest¶

Now that you’ve taken out the boss, head up to the chest at the end of the area and open it to complete the Trial of Discipline.