A 3-notch charm that raises nail damage by 50%. Bought from Leg Eater in Fungal Wastes for 600 Geo, shatters on death, and pairs with Fury of the Fallen for a 170% damage stack.
Fragile Strength is the cheapest +50% nail damage charm in Hollow Knight, sitting in Leg Eater's Fungal Wastes shop for 600 Geo. According to the wiki, the charm shatters when the Knight dies in regular play, but a quiet exception saves most of the run cost: deaths in Dream Boss rematches and Godhome battles do not break the charm. Players who only equip it for Failed Champion, Lost Kin, and Pantheon fights never pay a repair fee.
Per the wiki, Fragile Strength reads as a high-risk Charm in its tooltip, which is why most first-time buyers stash it in inventory. In practice the +50% boost is the single biggest damage uplift available pre-Grimm-Troupe, and the 350 Geo Leg Eater repair fee is trivial once the Knight has cleared Crystal Peak and the City of Tears.
The wiki specifies the +50% boost applies to regular Nail strikes only. Nail Arts (Cyclone Slash, Great Slash, Dash Slash), Sharp Shadow, Dreamshield, and Thorns of Agony damage are not affected. Spell damage and summon damage also stay at base.
This guide covers the +50% mechanic, the Leg Eater pickup route, the Dream Boss safe-use exception, the Fury of the Fallen 170% stack, and the path to the Unbreakable Strength upgrade via Divine.
+50% nail damage at a 3-notch cost, shatters on death in regular play.
Buy from Leg Eater in Fungal Wastes for 600 Geo (480 with Defender's Crest).
Fury of the Fallen + Quick Slash for the 170% damage stack at 1 Mask.
Pure spell, Nail Arts, or Sharp Shadow builds; +50% applies to regular nail strikes only.Fragile Strength multiplies regular nail damage by 1.5 while equipped. Per the wiki, the boost applies to every standard up-slash, down-slash, and forward slash from the Knight's nail tier, scaling cleanly with each Nailsmith upgrade.
According to the wiki, the +50% does NOT apply to Nail Arts (Cyclone Slash, Great Slash, Dash Slash), Sharp Shadow, Dreamshield, or Thorns of Agony damage. This is a common surprise for players who build a Nail Art combo expecting the Strength multiplier; the Nail Arts run from base tier instead.
The wiki specifies the charm shatters on death. Leg Eater is the only NPC who can repair it. The shatter happens whether the Knight dies to enemies, spikes, or fall damage in the regular world, but two zones are exempt and form the basis of the safe-use playbook covered below.
Per the wiki, Pure Nail at 21 base damage becomes 31.5 damage per swing with Fragile Strength equipped. Old Nail at 5 base damage becomes 7.5. The multiplier stays constant across nail tiers; only the underlying damage number changes.
| Stat | Value |
|---|---|
| Notch cost | 3 |
| Damage boost | +50% regular nail damage |
| Affects | Standard nail swings only |
| Does not affect | Nail Arts, Sharp Shadow, Dreamshield, Thorns of Agony, spells, summons |
| Shop price | 600 Geo (Leg Eater, Fungal Wastes) |
| Discounted price | 480 Geo with Defender's Crest equipped |
| Repair price | 350 Geo per shatter (280 with Defender's Crest) |
| Breaks on death | Yes, in regular play |
| Does NOT break | Dream Boss rematches and Godhome battles |
| Upgrade path | Unbreakable Strength via Divine, 15,000 Geo |
Per the wiki, Fragile Strength is the cheapest +50% nail damage source in the game and the only one available before the Grimm Troupe DLC summon. The shop price of 600 Geo is reachable inside the first hour, which makes it the standard early damage spike for fresh saves.
Leg Eater sits in a small chamber on the south side of Fungal Wastes, near the entry from the Forgotten Crossroads. The shop opens after the Knight pays him to stop crying. Per the wiki, the one-time fee is 60 Geo and unlocks all four Fragile charms for purchase.
Per the wiki, Leg Eater sells Fragile Heart and Fragile Greed on the same counter. A single visit can stock all three (1,500 Geo total at 1,200 with Defender's Crest), which front-loads the Fragile economy before the Knight commits to Divine's 36,000 Geo Unbreakable conversion total.
Dream Boss rematches and Godhome battles do not shatter Fragile Strength. Per the wiki, the charm survives every death inside those instances, which turns Fragile Strength into a near-free Pantheon damage charm with no Unbreakable conversion needed.
According to the wiki, Failed Champion, Lost Kin, Soul Tyrant, White Defender, Grey Prince Zote, and every Pantheon fight inside Godhome count as safe deaths. The Knight ragdolls back to the dream entry without the shatter animation firing on the charm.
The wiki notes this is the canonical Pantheon damage charm for budget runs that have not yet farmed the 15,000 Geo Unbreakable Strength conversion. Players who only need +50% nail damage for Hall of Gods grinding can skip the Divine trade entirely.
Per the wiki, the exception does NOT apply to Dream Warriors (Xero, Gorb, Marmu, No Eyes, Markoth, Galien). Those are dream fights with regular death penalties; the Knight shatters Fragile Strength on a Markoth wipe but survives a Lost Kin wipe. The split tracks the Awoken Dream Nail vs standard Dream Nail mechanic.
Fragile Strength sits inside the same nail-core combos as its Unbreakable upgrade. Per the wiki, the Fury of the Fallen pairing stacks to roughly 170.6% damage at 1 Mask, which is the highest single-swing damage ceiling in the game outside of Nail Arts.
Fury of the Fallen stackAccording to the wiki, Fury of the Fallen adds +75% nail damage at 1 Mask. Combined with Fragile Strength's +50%, the multiplicative stack reaches ~170.6% damage per swing. Pure Nail at 21 base damage hits for roughly 57 damage per strike at 1 Mask with both charms equipped. Notch cost: 5 (3 + 2).
Quick Slash pairingPer the wiki, Quick Slash adds +54% nail attack speed. Stacked with Fragile Strength's +50% damage, the effective nail DPS climbs to roughly 2.3x baseline. The 6-notch combo (3 + 3) leaves room for either Quick Focus or Stalwart Shell in the 11-notch budget.
Mark of Pride pairingThe wiki specifies Mark of Pride extends nail reach by 25%. The combination with Fragile Strength turns tight boss arenas (Mantis Lords, Soul Master) into clean kite-and-strike patterns. Notch cost: 6 (3 + 3); the trio with Quick Slash forms the 9-notch canonical nail spine.
According to the wiki, Fragile Strength does NOT stack with the +50% from Unbreakable Strength. Only one version of the charm can be equipped at a time, and the Knight cannot double-dip the damage bonus by carrying both.
The 9-notch nail trio plus a survival filler is the canonical Fragile Strength loadout. Per the wiki, the trio fits inside the 11-notch budget before any Salubra expansion and dominates early-to-mid-game boss DPS.
Fragile Strength (3 notches; +50% nail damage) Quick Slash (3 notches; +54% nail speed) Mark of Pride (3 notches; +25% reach) Fury of the Fallen (2 notches; +75% damage at 1 Mask)Per the wiki, this 11-notch loadout covers damage, speed, reach, and a low-HP panic damage layer in one budget. In actual play, the loadout fits Failed Champion, Lost Kin, and early Pantheon runs without overcharming; the trade is no survival sustain, so the SOUL pool runs to Focus heals only.
Per the wiki, the Pantheon and Hall of Gods safe-use exception means Fragile Strength can stand in for Unbreakable Strength in this loadout for as long as the player sticks to Godhome content. The 15,000 Geo Divine upgrade is only mandatory once the Knight starts dying in the regular world with Strength equipped.
Divine in Dirtmouth converts Fragile Strength into Unbreakable Strength for 15,000 Geo. Per the wiki, the conversion eats the Fragile charm and returns the Unbreakable version with the same +50% effect but no shatter penalty.
According to the wiki, the upgrade is locked behind the Grimm Troupe DLC summon. The Knight has to light the Nightmare Lantern in Howling Cliffs after picking up the lantern from the Troupe Master's tent in Dirtmouth. Divine arrives in a tent next door once the summon completes.
The wiki notes the 15,000 Geo cost is the most expensive of the three Unbreakable upgrades (Heart is 9,000, Greed is 12,000). The break-even against the 350 Geo repair fee lands at roughly 43 deaths in the regular world; Steel Soul saves cannot afford a single Fragile shatter, so the upgrade is mandatory for that mode.
Fragile Strength ties to the Leg Eater Fragile economy, the Divine Unbreakable upgrade quest, and the canonical nail-build core. These spokes pick up the threads.
Game data and screenshots adapted from hollowknight.fandom.com, used under CC BY-SA 3.0. Original content remains the property of the wiki contributors and Team Cherry.