The Bloody Harvest event is here in Borderlands 3, and there are all kinds of challenges to complete and monsters to kill. Maurice, the talking dinosaur, wants to get to the bottom of these hauntings. To do this, you will have to kill Captain Haunt.
Borderlands 3 - My Boss Ghosted Me All Week - Kill Captain Haunt
To kill Captain Haunt, you must first collect 25 Hecktoplasmas. You can get Hecktoplasmas by killing enemies that are haunted. Haunted enemies will have a strange energy surrounding them, so they're easy to spot. Just go to a place where you know there are a lot of enemies, and assassinate it until you get the 25 Hecktoplasmas you need.
Once you have them all, head back to Mauritius on Sanctuary III. Talk to him and a portal will open behind him. Jump through, and you'll be taken to Heck, to try and find out what's going on. You will have to make your way through different areas and eventually you will come to a locked door. Simply kill enemies in the area until a Keymaster arrives. The first Keymaster is a fierce enemy, so take him out to open the door.
The second Keymaster has a shield protecting them connected to two shielding phylacteries. Take them both to drop his shield, then kill him to continue. The third and final Keymaster will not have a shield but will regenerate quickly. Get them out quickly.
Eventually you will come to Captain Haunt himself. Haunt has a large shield, so take it out with Electric Damage, then use its health bar. If you take away a third of his health points, more and more protection pylacteries will appear to protect him. Take them out, then damage it again and repeat the cycle until it's dead.