The King of Nothing.
Mithrix is Providence's brother, banished to the moon of Petrichor V. Beating him and escaping ends the game: 52.1% of Steam players have done it; on Monsoon
, 23.7%.
Reach the moon, charge four pillars, win four phases and escape in three minutes. Step by step.
Mithrix is Providence's brother, banished to the moon of Petrichor V. Beating him and escaping ends the game: 52.1% of Steam players have done it; on Monsoon, 23.7%.
Before you go, spend your gold: there are no normal chests on the moon, only cauldrons to trade items and lunar pods.
The escape ship is shielded. To reach Mithrix's arena you have to charge 4 pillars, out of 4 to 7 spread over four areas. They charge like a teleporter, by staying inside their circle:
With four charged, the jump pads to the arena light up. In co-op, split up: charge time does not drop with more players on the same pillar.
The hammer
He runs at you. Standing still, he raises the hammer and slams the ground: the hit and the blast (12 m) deal huge damage, but it is slow: step away when you see him raise it. While running, he throws homing shards. He also leaps to the middle and sends out a ring of shockwaves you dodge by jumping.
The throne
He sits on a floating throne and cannot be damaged. Lunar Chimeras spawn: kill them all to bring him down. The pillars that rise in the arena help you climb: he cannot.
The blue hammer
He returns with the same moves, stronger: each slam leaves a pillar of blue fire that lasts 45 seconds (do not stand in it) and sends shockwaves. After his leap, he makes a wheel of nine pillars that spin and strike five times: move with them.
The items
He comes back weak and without his hammer, and steals your items for a few seconds. Then he uses some of them against you. Each hit you land gives some back, and killing him returns them all. He moves slowly and only attacks from range: shards and a blast with orbs that spiral out and back.
When Mithrix dies the moon starts to blow up: you have 3 minutes. Jump into one of the portals floating around the arena, run to the ship and stay in its zone for 1 minute while enemies and fire pillars spawn. Once it charges, the run is over: 10 Lunar Coins and, the first time, Captain
.
Share of all Risk of Rain 2 players on Steam who have done it, from Steam's public stats on 31 October 2026.
with a damage equipment hits Mithrix even while he spawns.
going off in the middle, for example), he steals nothing.
, Will-o'-the-wisp
) barely help: there is only one enemy.
he can revive once, and with a Medkit
or Purity
he gets tougher. reach the arena without the jump pads.Every other boss, attack by attack, in the boss guide.
Clear stage 5 (Sky Meadow or Helminth Hatchery). Its teleporter is the Primordial Teleporter: leave it aligned with the moon (spiral closed, as it spawns) and it takes you to Commencement. There, charge four pillars and climb to the arena using the jump pads.
Four. In phase 1 he fights with his hammer; in phase 2 he sits on a throne and you have to kill the Lunar Chimeras; in phase 3 he returns with stronger attacks; and in phase 4 he steals your items and you have to hit him to get them back.
In phase 4 he takes your items and uses some of them against you. Each time you damage him he gives some back, and when he dies he returns them all. Gesture of the Drowned with a damage equipment, or steady damage right as the phase starts, helps.
The first time, Captain (Washed Away challenge). On Monsoon, also the lunar item Purity and the mastery skin of the survivor you play. And 10 Lunar Coins every time.
Yes, if you reach the arena without the jump pads: with Loader's grapple, Artificer flying, Mercenary chaining his secondary with Purity, or equipment like the Eccentric Vase. In co-op, everyone has to get in.
Sources: the Risk of Rain 2 wiki (Mithrix, Commencement and Teleporter pages), the game's own names and public Steam stats, as of 31 October 2026. Icon: Risk of Rain 2 (Hopoo Games / Gearbox).