Borderlands 4 Horrors of Kairos (Halloween event) guide

Borderlands 4 recently kicked off its first holiday event, Horrors of Kairos. A predictably Halloween-flavored event, it channels one of my favorite Slayer tracks, because it’s literally Raining Blood. At the very least, it rains blood in the areas where you find the holiday event. While the Uniques you can pick up from the event are pretty amazing, the downside is that it’s even more RNG than you might be used to.

From November 23 until November 6, 2025, the Horrors of Kairos event will be available in Borderlands 4. It’s not restricted to difficulty level, either. You can play whatever difficulty feels right, whether Easy or UVH4.

What to expect during the Horrors of Kairos event in Borderlands 4

The Horrors of Kairos event in Borderlands 4 puts all those randomly-occuring Boss Rifts to use, by putting new Uniques in them. You remember those huge, translucent bubbles that occasionally show up in the world? That’s it! That’s the whole event. The only real change is that now, when you’re near or in one, the world effect has it raining blood.

Just remember: Have a solid way in, and don't leave until the boss is dead (or you're defeated) (Image via 2K Games)

It’s the same bosses that you could fight in the previous Rift Boss events, like Psych0-Bot, only, there’s potential for new gear to drop. When you defeat the boss in question, you’ll go to your rewards caches, and crack them open. That’s where the new Legendaries can drop:

Murmur (Tediore Assault Rifle): Always crits enemies below 35% health.
Skully (Grenade Ordinance): Fires projectiles that home in on the nearest target

There’s also a free cosmetic you can pick up, using a SHIFT Code. For the Gourd Your Loins Head Piece and Hex Appeal Weapon Skin, just use the following SHIFT Code:

Gourd Your Loins/Hex Appeal: 3S6BB-ZXT93-KRT3W-BT3T3-JW6TZ

Potential places to farm Rift Bosses for Horrors of Kairos in Borderlands 4

For good or for ill, the Horrors of Kairos event in Borderlands 4 requires you to find and defeat Rift Bosses. These can technically spawn just about anywhere on the map. When you enter a zone, there’s a chance a Rift Boss will be available for you to fight.

These events can pop up anywhere, but these are some of the most reliable spots (Image via 2K Games)

This means you need to fast travel out of a region and back in, a few minutes (3-4M) if you’re trying to farm a specific location. While no area is truly guaranteed to have a Rift Boss you can farm, the below areas have been the most reliable for the community.

Punitive Manufactorum (Terminus Ridge East)
Fishing Spot (Fadefields)
Forest North of Launchpad (Fadefields)
Route to Plungeford from The Stockroom (Fadefields)

It’s also important to note that if you leave the Rift Boss arena, or if you die, you fail, and won’t get the loot you’re after. These items will likely not be available again in-game, except perhaps through Golden Key chests, or perhaps if the event remains the same next year.

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About the author

Jason is an Esports and Gaming journalist at Sportskeeda holding an amazing 11 years of experience under his belt. Having put out 4000-plus articles and amassing over 15 million reads for Sportskeeda, he is among the company’s most experienced writers. Jason holds a Bachelor's degree in English from UNC Pembroke and was inspired to become a gaming journalist very early on in life after reading Nintendo Power.

Jason is a jack of all trades when it comes to gaming journalism. He’s a key writer in Sportskeeda's MMO department, but he also likes to help out in other categories, like streamers, RPG, card games, and whatever else is needed. A solo gamer at heart, Jason's favorite titles include Earthbound and Dragon Warrior.

Jason places high value on accuracy and relevance in his write-ups. He achieves this with thorough research to sift facts from rumors. One of the biggest highlights of his career is his interview with Canadian pro wrestler Kenny Omega about his inclusion in the Like a Dragon game series. He is also good friends with journalist Kazumo Hashimoto, who he admires for the kind of stories he works on and his deep ethics.

A true cinephile, one of Jason’s primary hobbies involves enjoying cinematic experiences. He also loves reading, be it fiction or manga, when not working. Additionally, he streams on Twitch and posts his gaming insights on YouTube.

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Edited by Jason Parker