Thorns of Agony is a Charm in Hollow Knight. It causes the Knight to sprout thorny vines when taking damage which damage nearby enemies.

Usefulness

The Thorns of Agony deal damage equal to the base damage of the Nail, capable of hitting twice if within range. The main downside of this Charm is that it deals damage without collecting SOUL, and, in some situations, it may kill easier enemies that would have been useful for regaining SOUL.

The animation for Thorns of Agony also takes up invincibility frames as the Knight cannot be controlled until the animation is over. This reduces the number of invincibility frames that the Knight has to move or reposition.

This charm is particularly useful when fighting multiple enemies at the same time, especially in the Colosseum of Fools.

This charm is not recommended for use in Fog Canyon as damaging Oomas makes them burst, releasing their explosive core that home in on the Knight, dealing two Masks of damage.

How to Acquire

Found in Greenpath in a maze of thorns featuring Charged Lumaflies. Requires Mothwing Cloak to reach.

Charm Interactions and Combo Tips

Stalwart Shell.png
Stalwart Shell

Decreases the time taken for thorns to activate after being hit. Increases the animation speed and leaves extra invincibility frames after the ones consumed by the animation.

Baldur Shell.png
Baldur Shell

Thorns of Agony activates if the Baldur Shell is triggered, even if the Knight has not taken damage.

Carefree Melody.png
Carefree Melody

Thorns of Agony still triggers even if damage was negated by Carefree Melody.

Trivia

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
Grimm Troupe Icon.png The Grimm Troupe Content

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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