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Volpedia/Games/Hollow/Bosses/Nightmare King Grimm
HOLLOW KNIGHT / BOSSES

Nightmare King Grimm

An optional extremely fast boss with tight reaction windows and little free healing.

BOSSESReviewed 2026-10-28Reference · noindex
Original Hollow Knight editorial concept diagram, not a game screenshotOriginal Volpedia diagram
OverviewCharacters20Weapons9Charms39Abilities10Spells8Maps20Bosses30Enemies12Items16Quests9Godmaster11Modes5Progression10Builds6Endings5Guides19Tips10Tools2
Volpedia strategy: Practice movement rhythm and learn where each attack safely ends.
How it worksPractical strategyCommon mistake to avoidRelated entries
01

How it works

An optional extremely fast boss with tight reaction windows and little free healing.

02

Practical strategy

Practice movement rhythm and learn where each attack safely ends.

03

Common mistake to avoid

Overhealing during fire or dive sequences.

CONTINUE INSIDE VOLPEDIA

Related Hollow Knight articles

bossesTroupe Master Grimm

A ritual-related boss using patterned fire, bats and sweeping movements.

guidesGrimm Troupe Ritual and Choices

Investigate Howling Cliffs to begin the Grimm Troupe path.

charmsCarefree Melody

An alternate reward associated with banishing the Grimm Troupe.

modesGrimm Troupe Content

A free content pack focused on an optional ritual and several encounters.

charmsGrimmchild

A companion Charm associated with completing the Grimm Troupe ritual.

mapsHowling Cliffs

A quiet western region containing a Nailmaster and Grimm-related content.

Back to Bosses
IN THIS ARTICLEHow it worksPractical strategyCommon mistake to avoidRelated articles
MORE CATEGORIESCharactersWeaponsCharmsAbilitiesSpellsMapsEnemiesItemsQuestsGodmasterModesProgressionBuilds

Independent Volpedia encyclopedia for Hollow Knight by Team Cherry; not Hollow Knight: Silksong. Original editorial diagrams are symbolic, not game screenshots or exact character depictions. Existing approved cover preserved. Verified editorial references are recorded in the internal M60 source registry. Hollow Knight and associated names are trademarks of their respective holders. Editorial review: 2026-10-28.

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