The Risk of Rain 2 Karma system is an optional way to make Mithrix much nastier. Added with the October 8 free update, it stacks new hazards and boss modifiers as your run builds Karma, all the way to level eight.
The big mistake is treating Karma as a simple damage slider. A tougher shell, gravity effects, Karmic Spires and shorter attack cooldowns can force a very different strategy. Here’s what changes as the level climbs and why Commando players have a particular reason to reach the cap.
Risk of Rain 2 Karma system: Karma is a free-update setting, not DLC loot
The Karma system arrived with the October 8 update but isn’t locked behind a Hallowed Concepts purchase. It changes the Mithrix fight when activated for your run. Karma is disabled by default, so you shouldn’t assume every trip to Commencement now includes the new mechanics. With the setting enabled, certain milestones increase your Karma until the maximum of eight, and Mithrix gains cumulative changes depending on the level you’ve built up. The Risk of Rain 2 Karma system is disabled by default, so check your lobby setting if you’re expecting the tougher version of Mithrix.
How Karma changes Mithrix’s stats
Every Karma level adds 1% to Mithrix’s damage. From 2 Karma onwards, his movement speed and attack speed increase by 30%. At 6 Karma, his skill cooldowns are halved, apart from specific lower limits on some special attacks. At 8 Karma, Mithrix also gains 50% extra maximum health. These boosts are cumulative rather than replacing one another, so an eight-Karma attempt combines the earlier increased speed, harder attacks and more health. The first level of the Risk of Rain 2 Karma system punishes mindless damage dumping while Mithrix’s temporary shell is active.
Karma level 1: damage-limiting shell
At the first Karma level, Mithrix gains a temporary defensive shell when you’ve dealt damage equivalent to 10% of his maximum health. For five seconds, each hit is reduced to one damage. That creates a major trap for fast-hitting builds: unloading every attack just as the shell triggers wastes damage, so recognise the protection and keep yourself safe until it expires. Mithrix’s appearance also begins changing visually as Karma rises. At two Karma, the Risk of Rain 2 Karma system begins affecting how the arena behaves, not just the boss’s numbers.
Risk of Rain 2 Karma system: Karma level 2: faster Mithrix and extra attacks
At two Karma, Mithrix becomes quicker and more aggressive. His Shock Wave adds bombs around the arena that detonate in sequence and create expanding damage rings. A gravity well also appears over the area where he lands, pulling players toward the danger. His Dash can leave temporary crystal spikes behind him. This is the point where the fight starts to feel noticeably different from a normal zero-Karma encounter, not just like the same boss with more health. Levels three and four in the Risk of Rain 2 Karma system keep the earlier pressure in place, so preparation still matters.
Karma levels 3 and 4: keep watching the phases
Karma is cumulative, meaning a run at levels three and four retains the earlier shell, enhanced movement and attack behaviours. Don’t assume surviving a new opening phase means the later portions of the battle will be identical to the base-game encounter. At four Karma, the boss subtitle changes from King of Nothing to Apocalypse Aspirant. Some mechanics are phased and others appear in the game files without being active, so don’t plan around unreleased or unused variations. The Risk of Rain 2 Karma system becomes harder to ignore when Karmic Spires start filling valuable space around the arena.
Karma level 5: Karmic Spires
From five Karma, Mithrix can summon Karmic Spires, stationary crystals that create dangerous areas and attack players with projectiles. Their Cripple aura expands over time and can eventually cover a very large radius, so don’t ignore a spire while focusing entirely on the boss. Each spire has its own health and can be destroyed. Cleaning them up gives you more breathing room and makes it easier to see and dodge the boss’s other attacks. At six and seven Karma, the Risk of Rain 2 Karma system leaves much less time to recover after a difficult dodge.
Karma level 6 and 7: less time between attacks
At six Karma, Mithrix’s skill cooldowns drop by 50%. This significantly tightens the windows you have to reposition, heal and resume damage. Seven Karma retains those changes rather than adding another simple flat speed buff. If you’re practising the system, focus on learning the order and tells of Mithrix’s attacks before attempting a maximum-Karma run, especially if you rely on a long cooldown mobility ability to escape his strongest patterns. Eight is the maximum in the Risk of Rain 2 Karma system. Your survival tools matter as much as the damage you’ve built.
Karma level 8: the maximum challenge
Eight is the Karma cap. Mithrix gains 50% maximum health on top of the prior modifiers, and the whole fight becomes a test of stamina as well as damage. The build needs enough mobility to survive the gravity well and expanding danger zones, enough sustained damage to cope with the defensive shell, and a way to keep Karmic Spires from taking over the arena. This setting is deliberately harder than a normal Mithrix encounter, so a longer build-up isn’t necessarily a free advantage. The Risk of Rain 2 Karma system also unlocks Commando’s Sabotage challenge when you land the final Mithrix kill at eight Karma.
How to unlock Commando’s Sabotage
The Commando: Retribution challenge requires beating Mithrix at eight Karma while playing Commando. Importantly, the Commando player must land the killing blow on Mithrix in phase four. Bringing Mithrix down with another survivor’s final attack won’t count for that Commando unlock. You also need Karma enabled; it is not possible to complete the challenge with the run setting turned off. Completing it unlocks Commando’s alternate Special, Sabotage, which throws three surface-attaching explosives that zap enemies when attacked.
Does Karma work in Eclipse?
Yes, but it behaves differently from a casual standard run. The game wiki documents that Eclipse runs begin with Karma equal to the Eclipse level. Karma remains a base-game update feature, not a paid expansion feature. If you’re using Eclipse to chase Sabotage, make sure you understand the separate difficulty restrictions and still satisfy the exact eight-Karma finishing condition. A run already sitting at the required Karma level isn’t enough unless Commando gets the final blow in the last Mithrix phase.
The Risk of Rain 2 Karma system is optional, so there’s no shame in learning a lower setting before attempting the eight-Karma challenge.
One last thing about Risk of Rain 2 Karma system: check the exact objective in your run before spending resources you might need later.
With Risk of Rain 2 Karma system, the easiest mistakes usually happen when you leave the stage or arena before collecting the reward.
Related Guides
Official source: 2K’s October 8, 2026 Risk of Rain 2 patch notes.
