Honestly eridium is the most annoying currency in Borderlands 4 because you need absurd amounts of it for the endgame and the game never really tells you where to farm it efficiently, I mean you need 250 eridium per anointment reroll at Crazy Earl's and if you're like me and you burn through 5000 eridium in one sitting trying to get the right anointment on a single weapon you quickly realize that casual eridium gains from just playing the game are nowhere near enough, tbh I wasted probably my first 100 hours just picking up random eridium Crystals from the ground and getting like 20 per hour which is absolutely terrible, so here's everything I've learned about min-maxing eridium farming including the best locations optimized methods and how to not waste all your hard-earned purple rocks on bad rerolls
What You Actually Need Eridium For
Before we get into farming let's talk about why you even need eridium because some people hoard it and never spend it which is honestly just as bad as wasting it, the main sink is Crazy Earl's Veterans Rewards Machine on Sanctuary III where you spend 250 eridium per reroll to change the anointment on any piece of gear and this is where like 90% of your eridium will go if you're optimizing your build, you can also spend eridium on cosmetics from Crazy Earl's shop including skins heads trinkets and weapon skins which range from 50 to 300 eridium each and tbh some of the heads are actually sick, there's also the Eridian Fabricator aka the Gun Gun which shoots out random weapons for 10 eridium per shot but honestly this is a trap because the legendary mode costs 250 eridium per shot and the loot is almost always garbage, and finally certain challenge modes and proving grounds have eridium entry fees ranging from 50 to 200 that you need to pay each run so if you're farming Takedowns you'll burn through eridium fast
Best Eridium Farming Locations Ranked
| Rank | Location | Eridium/Hour | Method | Difficulty |
|---|---|---|---|---|
| 1 | Voracious Canopy | ~500/hr | Smash Eridium piles + kill enemies | Easy |
| 2 | Ascension Bluff | ~400/hr | Speed-kill Sky Bull 7s | Very Easy |
| 3 | Carnivora | ~350/hr | Loop Eridium Crystal route | Easy |
| 4 | Konrad's Hold | ~250/hr | Maniac/Hag runs + piles | Medium |
| 5 | Slaughter Shaft | ~200/hr | Complete rounds, boss eridium | Hard |
Voracious Canopy (~500/hr) — Best Overall
Voracious Canopy on Eden-6 is hands down the best eridium farm in the game and honestly it's not even close, the map has the highest density of eridium crystal piles of any zone and each pile drops 8-15 eridium plus there's enough enemy spawns to keep your kill skills active, the route goes from the fast travel station through the central cavern then down into the lower area where the Jabberwock spawns and then back up and each loop takes about 3-4 minutes, with the Stone Commander Planetoid artifact equipped each pile drops double eridium so a single loop nets you roughly 80-120 eridium and you can do about 5-6 loops per hour comfortably, the Jabberwock is a guaranteed spawn and drops an additional 15-25 eridium per kill so you're basically double-dipping on every loop
Ascension Bluff (~400/hr) — Easiest to Execute
Ascension Bluff on Pandora is the lowest-effort farm if you just want to watch YouTube while farming eridium and ngl this is my go-to when I'm too tired to do the Voracious Canopy route, the strategy is stupid simple spawn at the fast travel station hop in a vehicle drive 5 seconds to the Skrakk spawn area and kill Skrakks over and over because each one drops 6-10 eridium and takes like 3 seconds to kill with any M11 weapon, the Sky Bull variant drops 12-18 eridium and spawns every 4-5 kills so the average eridium per kill is about 8, you can get roughly 50 kills per hour including save-quit time and each kill takes about 7 seconds total so you're looking at very consistent 400 per hour with basically zero brain activity required
Carnivora (~350/hr) — Good for Variety
Carnivora on Pandora is the third best option and it's a nice change of pace because you're running a loop instead of save-quit farming the same enemy, the route circles the outer ring of the Carnivora map and there are about 15 eridium crystal spawn points along the route plus several enemy camps that you can clear for extra drops, each loop takes about 5 minutes and nets 30-45 eridium which works out to roughly 350 per hour, it's not as efficient as the top two but if you're farming for XP or world drops at the same time this is actually the best multi-purpose farm
Optimal Farming Setup: Gear You Need
The single most important piece of gear for eridium farming is the Stone Commander Planetoid artifact which doubles all eridium drops and honestly if you don't have this equipped you're literally farming at half speed, it drops from any loot source on Mayhem 4+ but your best bet is farming Graveward on Mayhem 10/11 because he drops artifacts at roughly a 15% rate and you can kill him in under 30 seconds with the right setup, the other crucial piece is any weapon or shield with the URad anointment which gives +100% radiation damage when you're below 50% health, you want to keep your HP below half permanently by using a Deathless artifact or a front-loader shield and then every enemy just melts to radiation damage which makes farm routes way faster, for the actual farming weapon anything with high burst damage works but I personally recommend the Monarch for Skrakk farming because the bipod mode deletes them before they can even finish their spawn animation, and if you're running Voracious Canopy bring a Flipper for the mob density because the chain damage clears groups instantly
Crazy Earl's Reroll Strategy: Don't Waste Your Eridium
Okay so this is the part where most people burn through 10,000 eridium and get nothing because they don't understand how anointment rerolls actually work and tbh I was one of those people for way too long, the Veterans Rewards Machine costs 250 eridium per reroll and the anointment pool is huge so getting the exact anointment you want takes on average like 15-20 rolls which is 3750-5000 eridium per weapon, the most important rule is to never reroll a weapon that has bad base parts because a perfect anointment on a trash weapon is still a trash weapon, before you spend a single piece of eridium check the weapon parts first and if your Monarch has the wrong grip wrong stock and wrong sight you're literally better off farming a new one than wasting eridium on rerolls The reroll strategy I use is set a hard limit of 10 rerolls per weapon which is 2500 eridium and if you don't hit your anointment by roll 10 just stop and farm a new base weapon, the math supports this because you can farm a new dedicated drop in roughly 7-10 kills which takes maybe 15 minutes whereas farming 2500 eridium takes 5 hours at peak efficiency so you're way better off refarming the weapon, the only exception is if the weapon is super rare like Arms Race exclusives where farming a new base copy might take several hours then it's worth going to 20-25 rolls The anointments you should be targeting depend on your build but for general farming the URad anointment is king because it works on every character and every build and you trigger it by staying below 50% HP which is easy to maintain with the right gear, Fade Away 150% bonus damage is the best for FL4K builds specifically, while SNTNL Cryo 100% is the best for Zane, and the splash damage anoints are best for Moze obviously
- URad — Below 50% HP, +100% radiation damage (universal S-tier)
- Fade Away 150% — While Fade Away is active, +150% weapon damage (FL4K)
- SNTNL Cryo — While SNTNL is active, +100% bonus cryo damage (Zane)
- Splash 200% — After exiting Iron Bear, +200% splash damage (Moze)
- Consecutive Hits — +1% damage per hit, stacks 200x, resets on miss (universal A-tier)
- ASE Element — On Action Skill End, next 2 mags +100% element (universal B-tier)
Honestly once you have a good eridium farming route and the right gear the reroll system stops being frustrating and starts being this satisfying endgame loop where you're constantly optimizing your gear, the key is just getting over that initial hump where you feel like you're always out of eridium which is exactly what this guide is for, get the Stone artifact run Voracious Canopy for a few hours build up a bank of like 5000 eridium and then you can reroll with confidence instead of praying to RNGesus every single time