The Circles of Slaughter are a great way to farm experience, money, and weapons in Borderlands 3. There are three of them in total, spread throughout the game, and you will need to track them down on the various maps before you can take part in the fun.
The Circle of Slaughter takes place over five different waves, and your task is to kill all enemies and survive. Each wave, the enemies get a little tougher, and the potential rewards get better.
The Cistern of Slaughter
The Cistern of Slaughter can be found on the Meridian Metroplex, on Promethea. You will need to go to roughly the center of the map, then drop down to the very bottom. You will see an underground ramp leading downwards. Follow it and keep to the right, and you will come to the load point for the Cistern of Slaughter.
The Slaughter Shaft
For the Slaughter Shaft, you need to get to Konrad’s Hold on Pandora. This won’t be accessible until near the end of the campaign. You can see the loading point for the Slaughter Shaft shown on the map below.
Make your way to Desolation’s Edge on Nekrotafeyo, and you will find a quest giving near the area shown on the map below. It won’t pop up until you are close to the area. This quest will send you back to Sanctuary, and Slaugtherstar 3000 will now be a destination you can head to using a drop pod.