Hollow Knight Wiki
Advertisement
Hollow Knight Wiki
Bestiary.png
Passive outer being protecting an aggressive, explosive core.

Ghastly, eerie creature made out of thick liquid. You can peer right through them, and can't see where they keep their thoughts. I don't trust them at all. Keep away.

Dialogue Bottom.png

Oomas are enemies in Hollow Knight. They have a pulsing orange core which can propel itself through the air if the outer shell is damaged.[1] Monomon the Teacher has an unknown connection to them.[2]

Behaviour and Tactics

Floats up and down in place in a set pattern.

Its body bursts when hit, revealing its volatile orange core. After an extremely brief moment, the core homes in on the Knight, exploding on contact with the Knight, a wall, or an enemy and dealing 2 Masks of damage to the Knight and 50 damage to enemies. Ooma explosions deal infinite damage to normal enemies but deal 100 damage to Uumuu when fought in Godmaster Icon.png Godhome.

The core is tricky to avoid due to its travel speed, so it is advised to mainly avoid attacking Ooma when possible; they are otherwise passive.

A direct hit from a Vengeful Spirit/Shade Soul projectile continues pushing the explosive core along its path, often until it hits a wall and explodes. This is the safest way to destroy an Ooma but requires SOUL to be spent.

Another way to destroy Oomas without dealing with the exploding core is acid. If an Ooma is pushed into acid (via a Nail strike from above), the core is harmlessly destroyed along with the rest of the Ooma. Unfortunately, this method of killing does not allow Geo to be collected from the kill.

The Grimm Troupe Icon.png Weaversong, Grimm Troupe Icon.png Dreamshield, Glowing Womb, Grimm Troupe Icon.png Grimmchild, and Defender's Crest Charms attack them, and the volatile core is still launched at the Knight, so it is not recommended to wear these Charms while in Fog Canyon.

Dream Nail Dialogue Essence.png

  • ...MONOMON...

Location

They are found in large numbers in almost every area of Fog Canyon.

Gallery

Trivia

Shadow dash ooma.gif

  • Shadow Dashing through an Ooma while using the Sharp Shadow Charm causes its explosive core to always go to the right, independently of the direction dashed. Whether this is intentional or a bug in the in-game physics is unknown. The same happens if they are hit by Grimm Troupe Icon.png Dreamshield.

References

  1. Wanderer's Journal, p. 134.
  2. Ooma Dream Nail dialogue: "...MONOMON..."
Compendium Broken Vessel Idle.png
Main Game CrawlidVengeflyVengefly KingGruzzerGruz MotherTiktikAspid HunterAspid MotherAspid HatchlingGoamWandering HuskHusk HornheadLeaping HuskHusk BullyHusk WarriorHusk GuardEntombed HuskFalse Knight (Failed Champion) • MaggotMenderbugLifeseedBaldurElder Baldur

MosscreepMossflyMosskinVolatile MosskinFool EaterSquitObbleGulkaMaskflyMoss ChargerMassive Moss ChargerMoss KnightMossy VagabondDurandooDurandaAluba


Charged LumaflyUomaOomaUumuu


AmbloomFunglingFungoonSporgFungified HuskShrumelingShrumal WarriorShrumal OgreMantis YouthMantis WarriorMantis Lords


Husk SentryHeavy SentryWinged SentryLance SentryMistakeFollySoul TwisterSoul WarriorSoul Master (Tyrant) • Husk DandyCowardly HuskGluttonous HuskGorgeous HuskGreat Husk SentryWatcher KnightThe Collector


BelflyPilflipHwurmpBluggsacDung DefenderFlukefeyFlukemonFlukemarm


ShardmiteGlimbackCrystal HunterCrystal CrawlerHusk MinerCrystallised HuskCrystal Guardian (Enraged)


Furious VengeflyVolatile GruzzerViolent HuskSlobbering Husk


DirtcarverCarver HatcherGarpedeCorpse CreeperDeeplingDeephunterLittle WeaverStalking DevoutNosk


Shadow CreeperLesser MawlekMawlurkBrooding MawlekLightseedInfected BalloonBroken Vessel (Lost Kin)


BooflyPrimal AspidHopperGreat HopperGrub MimicHivelingHive SoldierHive GuardianHusk Hive


Spiny HuskLoodleMantis PetraMantis TraitorTraitor Lord


Sharp BaldurArmoured SquitBattle ObbleOblobblesShielded FoolSturdy FoolWinged FoolHeavy FoolDeath LoodleVolt TwisterZoteGod Tamer


XeroGorbElder HuMarmuNo EyesGalienMarkoth


WingmouldRoyal RetainerKingsmouldSiblingVoid Tendrils


Hornet (ProtectorSentinel) • Hollow KnightRadianceShadeHunter's Mark


Hidden Dreams Icon.png Hidden Dreams Grey Prince ZoteWinged ZotelingHopping ZotelingVolatile ZotelingWhite Defender

Grimm Troupe Icon.png The Grimm Troupe Grimmkin NoviceGrimmkin MasterGrimmkin NightmareGrimmNightmare KingSeal of Binding

Lifeblood Icon.png Lifeblood Hive Knight

Godmaster Icon.png Godmaster FlukemungaPale LurkerSisters of BattleWinged NoskNailmasters Oro & MatoPaintmaster SheoGreat Nailsage SlyPure VesselAbsolute RadianceVoid IdolWeathered Mask
Advertisement