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Grubsong is a Charm in Hollow Knight. It causes the Knight to gain 15 SOUL when taking damage.

Usefulness

A useful Charm at the cost of only one Notch as it provides a good amount of SOUL meter to use as healing in compensation for taking damage. The SOUL provided per hit is not enough for a heal on its own but combined with the SOUL gathered by striking enemies, or with other Charms that help gather SOUL faster, this Charm becomes incredibly useful for a Spell-focused build.

It also shines in difficult platforming areas where enemies are not readily available for gathering SOUL.

How to Acquire

Gifted by the Grubfather after 10 Grubs have been freed.

Charm Synergies

Grubberfly's Elegy.png

Grubberfly's Elegy
When used in combination with Grubberfly's Elegy, the amount of SOUL received from taking damage is increased by 10 (to 25).
Weaversong.png

Weaversong
When used in combination with Weaversong, the Weaverlings collect 3 SOUL upon striking an enemy, and can even gather SOUL from enemies that normally would give none from Nail hits (such as Siblings or the Collector). SOUL can be collected even after death, before the screen transition, allowing the Knight to wake up on a Bench with SOUL.

Charm Combo Tips

Hiveblood.png

Hiveblood
In combination with Hiveblood, it allows for regenerating SOUL infinitely, albeit slowly, by jumping into hazards or enemies, retreating, waiting for health to regenerate, then repeating.
Deep Focus.png

Deep Focus
Combined with Deep Focus or Hiveblood, it greatly helps to tackle difficult platforming challenges, especially the White Palace.
Soul Catcher.png

Soul Catcher
Good for a Spell-focused build as it further increases SOUL gained throughout a battle.
Soul Eater.png

Soul Eater
Good for a Spell-focused build as it further increases SOUL gained throughout a battle.

Trivia

  • The amount of Mask damage taken in one hit does not impact the amount of SOUL gained, as it always grants 15 SOUL (25 with Grubberfly's Elegy).
Charm Compendium
Main Game
Wayward Compass.png

Wayward Compass
Gathering Swarm.png

Gathering Swarm
Stalwart Shell.png

Stalwart Shell
Soul Catcher.png

Soul Catcher
Shaman Stone.png

Shaman Stone
Soul Eater.png

Soul Eater
Dashmaster.png

Dashmaster
Thorns of Agony.png

Thorns of Agony
Fury of the Fallen.png

Fury of the Fallen
Fragile Heart.png

Fragile Heart
Fragile Greed.png

Fragile Greed
Fragile Strength.png

Fragile Strength
Spell Twister.png

Spell Twister
Steady Body.png

Steady Body
Heavy Blow.png

Heavy Blow
Quick Slash.png

Quick Slash
Longnail.png

Longnail
Mark of Pride.png

Mark of Pride
Baldur Shell.png

Baldur Shell
Flukenest.png

Flukenest
Defender's Crest.png

Defender's Crest
Glowing Womb.png

Glowing Womb
Quick Focus.png

Quick Focus
Deep Focus.png

Deep Focus
Lifeblood Heart.png

Lifeblood Heart
Lifeblood Core.png

Lifeblood Core
Joni's Blessing.png

Joni's Blessing
Grubsong.png

Grubsong
Grubberfly's Elegy.png

Grubberfly's Elegy
Hiveblood.png

Hiveblood
Spore Shroom.png

Spore Shroom
Sharp Shadow.png

Sharp Shadow
Shape of Unn.png

Shape of Unn
Nailmaster's Glory.png

Nailmaster's Glory
Dream Wielder.png

Dream Wielder
Kingsoul.png

Kingsoul
Void Heart.png

Void Heart

Unbreakable Heart.png

Unbreakable Heart
Unbreakable Greed.png

Unbreakable Greed
Unbreakable Strength.png

Unbreakable Strength
Dreamshield.png

Dreamshield
Weaversong.png

Weaversong
Sprintmaster.png

Sprintmaster
Carefree Melody.png

Carefree Melody
Grimmchild.png

Grimmchild
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