Nail Upgrades Hollow Knight Guide

Mechanic / Hollow Knight (Patch v1.4.3)

The 4-step Nailsmith ladder that lifts base nail damage from 5 to 21, gated by 7,050 Geo total and 6 Pale Ore scattered across Hallownest.

Tiers: 5 (Old to Pure)Total cost: 7,050 Geo + 6 Pale OreSmith: Nailsmith (City of Tears)

Old Nail does 5 damage. Pure Nail does 21. According to the wiki, every Nailsmith upgrade adds a flat +4 damage and the curve gets worse on the way up: the first refinement is an 80% damage jump while the final tier is only 23.5% over Coiled, which is why most players notice diminishing returns by Pale Ore four.

Per the wiki, the chain runs Old Nail to Sharpened Nail to Channelled Nail to Coiled Nail to Pure Nail, and every step except the first requires Pale Ore on top of Geo. The Nailsmith in the City of Tears handles every forging; he takes 250 Geo for the first upgrade and scales fast from there.

The wiki notes spells DO NOT scale with nail upgrades, which is the buried lede most casual playthroughs miss. Late-game Warrior Dreams and Pantheon bosses have HP tuned to Pure Nail; running on Old or Sharpened Nail leaves the Knight chip-damaging through inflated health bars while spells stay the same DPS they were in Forgotten Crossroads.

This guide covers the 4-step damage ladder, the per-tier cost and Geo math, the 6 Pale Ore source list, the Strength charm multipliers, and the Pure Nail Purity achievement choice with the Nailsmith.

• What it is 4 Nailsmith upgrades raising nail damage from 5 to 21 across Old, Sharpened, Channelled, Coiled, and Pure tiers.
• Total cost 7,050 Geo + 6 Pale Ore from Sharpened (250 Geo) to Pure Nail (4,000 Geo + 3 Pale Ore).
• Stacks with Fragile Strength + Fury of the Fallen for +50% and +75% nail damage on top of the base tier.
• Skip when Pure spell builds; Vengeful Spirit and Shade Soul ignore nail damage scaling completely.

How Nail Upgrades Work

Every Nailsmith forging adds a flat +4 damage to every nail strike. Per the wiki, the addition is base-damage scaling, which means charms that multiply nail damage (Fragile Strength, Unbreakable Strength, Fury of the Fallen) all multiply the upgraded value, not the Old Nail value.

According to the wiki, the upgrades affect every nail strike: standard slashes, Down Slash, Up Slash, and the three Nail Arts (Cyclone Slash, Great Slash, Dash Slash) at their 1x to 2.5x multipliers. Sharp Shadow shadow-dash damage and Thorns of Agony counter damage also scale with the upgraded base.

The wiki specifies the exception list: spells (Vengeful Spirit, Shade Soul, Howling Wraiths, Abyss Shriek, Desolate Dive, Descending Dark), Glowing Womb Hatchlings, Weaverlings, and Grimmchild projectiles all fire at fixed base damage that ignores nail tier. Pure-spell builds get nothing from the ladder.

The 4-Tier Ladder

The chain runs five named tiers, four upgrades. Per the wiki, every tier adds exactly +4 damage over the previous one with no exceptions or bonus effects.

The wiki notes the diminishing-returns pattern: the first upgrade nearly doubles output for 250 Geo and zero Pale Ore, while the final upgrade asks for 4,000 Geo and 3 Pale Ore in exchange for a smaller percentage jump. In practice, Sharpened Nail is the best-value upgrade in the game and Pure Nail is the worst pound-for-pound, even though every tier is worth the trip back to the City.

Geo and Pale Ore Cost Per Step

The total tab is 7,050 Geo and 6 Pale Ore. Per the wiki, the prices scale aggressively after the first upgrade, and the Pale Ore requirement climbs from 0 to 1 to 2 to 3 across the four forgings.

According to the wiki, the Geo side of the cost is the easier half to clear. A handful of City of Tears Husk Sentries or Soul Twister farm loops cover most tiers, and Geo Rocks in Crystal Peak top up the buffer. Pale Ore is the actual gate; the 6 pieces are scattered across 6 different progression checkpoints.

All 6 Pale Ore Sources

Six pieces of Pale Ore sit across Hallownest and gate every upgrade past Sharpened. Per the wiki, the six sources span 6 different regions and progression points, so the full Pure Nail unlock pairs naturally with completionist exploration.

1. Ancient Basin corpse. Per the wiki, a piece sits on a Hallownest knight corpse in Ancient Basin, below the Broken Vessel arena chamber. Mantis Claw lets the Knight reach the platform.
2. Crystal Peak Dark Room. A Pale Ore sits at the end of the Crystal Peak Dark Room jumping puzzle, where moving crystal platforms light the way. According to the wiki, the chamber sits in the upper-east Crystal Peak section past Husk Miner-heavy tunnels.
3. Hallownest's Crown summit. Per the wiki, a piece rests at the very top of Hallownest's Crown, the sub-area above Crystal Peak. The climb is a vertical platforming gauntlet of Husk Sentries and Crystallised Husks; Monarch Wings and Crystal Heart help the final segments.
4. Trial of the Conqueror reward. The wiki specifies that clearing the second Colosseum of Fools trial drops a Pale Ore as the reward chest pickup. The 450-Geo entry plus 17 waves of mid-tier enemies tests both damage and sustain.
5. Seer 300 Essence reward. Per the wiki, the Seer in Resting Grounds gives a Pale Ore at the 300 Essence milestone, alongside other progression rewards at lower tiers. Whispering Roots and Dream Warriors are the main Essence sources.
6. Grubfather 31-grub reward. Grubfather hands over a Pale Ore once the Knight has rescued 31 of the 46 Grubs in the save. The wiki notes the grub gates also include Hallownest Seals and a Mask Shard at other milestones.

When to Upgrade During a Run

Sharpened Nail before the first major boss and Coiled Nail before the Forgotten Crossroads rematch is the canonical pacing. Per the wiki, Old Nail at 5 damage struggles against mid-game bosses (False Knight 75 HP at 15 hits, Mantis Lords 75 HP each at 15 hits), while Sharpened at 9 damage cuts those numbers nearly in half.

According to the wiki, the natural progression order is: visit the Nailsmith immediately after the Knight first crosses into City of Tears (Sharpened, 250 Geo), forge Channelled after the first Ancient Basin trip (Pale Ore #1 + 800 Geo), then upgrade to Coiled once Crystal Peak Dark Room and Hallownest's Crown are both cleared (2 Pale Ore + 2,000 Geo).

The wiki specifies Pure Nail is the endgame fight. By the time the Knight has 3 leftover Pale Ore, all the gating rewards (Trial of the Conqueror, Seer 300 Essence, 31 Grubs) have been cleared and the save is in the Hidden Dreams / Pantheon prep window. Pure Nail is the right pick before Pantheon of the Knight or the Path of Pain stretch goals.

Strength Charm Stacking

Fragile Strength and Unbreakable Strength apply a +50% multiplier on top of the nail tier, and Fury of the Fallen adds a separate +75% at 1 Mask. Per the wiki, both effects compose multiplicatively when stacked, which means the Pure Nail + Strength + Fury chain lifts a 21-damage strike to 55 damage at the panic threshold.

Base Pure Nail (21 damage; 4,000 Geo + 3 Pale Ore tier)

+50% Fragile Strength (3 notches; 21 to 32 damage)

+75% Fury of the Fallen (2 notches; 32 to 55 damage at 1 Mask)

Speed Quick Slash (3 notches; +54% attack rate, multiplies DPS not damage per hit)

Permanent Unbreakable Strength (3 notches; same +50% as Fragile, no shatter risk; 15,000 Geo via Divine)

According to the wiki, the Pure Nail + Strength + Fury + Quick Slash stack is the speedrun nail core for Pantheon and Path of Pain. In actual play, the 55-damage panic threshold turns 2-hit kills on Pantheon-tier Crystal Hunters and lets the Knight chip Pure Vessel for 6.5% HP per strike. The trade-off is the 11-notch budget pinch, which forces a tight charm spread.

Common Mistakes

1. Skipping Sharpened Nail for spell builds. Per the wiki, the first upgrade is 250 Geo flat and the +80% damage jump applies to Sharp Shadow, Thorns of Agony, and Nail Arts. Even pure-spell builds benefit from the floor lift since nail strikes generate SOUL for cast economy.
2. Hoarding Pale Ore for Pure Nail first. The wiki specifies the tiers must upgrade in order. The Knight cannot spend 6 Pale Ore at once for Pure Nail; the Nailsmith requires the prior tier as a prerequisite for each forging. Sharpened to Channelled to Coiled to Pure is fixed.
3. Expecting spell damage to scale. Per the wiki, Vengeful Spirit stays at 15 base damage from Old Nail saves to Pure Nail saves. Late-game Warrior Dreams and Pantheon bosses with HP tuned to Pure Nail feel impossibly long on pure-spell builds without Shaman Stone's +33%.
4. Forgoing Strength charms to fit Quick Slash. The wiki notes Strength multipliers and Quick Slash are multiplicative, not exclusive. Pure Nail + Strength + Quick Slash + Mark of Pride is the standard 9-notch damage core; dropping Strength to fit defensive charms cuts a third of the build's output.
5. Killing the Nailsmith before understanding the Purity choice. Per the wiki, after Pure Nail is forged the Nailsmith asks to be cut down. The "kill" awards the Purity achievement and the "spare" opens the Happy Couple ending tag with Sheo in Greenpath. Both are missable; the Nailsmith spoke covers the full split.

Nail Upgrades FAQ

More Hollow Knight Guides

The nail-upgrade ladder ties to the Nailsmith, the Pale Ore search, the Colosseum reward chest, and the Strength charm multipliers. These spokes pick up the threads.

NailsmithCity of Tears smith and Purity choice

Pale OreAll 6 upgrade-material locations

NoskDeepnest boss with optional 7th Pale Ore

Fragile Strength+50% nail damage multiplier

Colosseum of FoolsTrial of the Conqueror Pale Ore reward

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