Core Keeper Codex
1.2.1.5 · verified 2026-09-07

Atlantian Worm Sword

Epic · item level 17

Rarity
Epic
Item level
17
Base damage
300
DPS
750.0 base ÷ cooldown
Attack cooldown
0.4s
Durability
525
Sell value
—
Stackable
No
Slot
Held
Object ID
8,911

What the damage number is, and what it is not

Base damage 300 is read straight from the game's files for this item at item level 17. It is the right figure for comparing weapons: across the sword line it rises 33 → 50 → 132 → 163 → 214 → 248 → 280.

What we do not publish is the number the game prints on the tooltip in a live world. This site briefly did, using a formula fitted to an outside source, and it was wrong — it produced almost the same value for every weapon in a tier ladder, rating a Copper Sword above a Solarite Sword. It has been withdrawn rather than quietly corrected. The full account is on the method page.

What it grants while held

StatValueMultiplier
Increased Damage Against Bosses17—
Life On Hit4—

These are the condition values the game applies. The files do not label their units, so the raw value is shown rather than a percentage sign that might be wrong.

Where to get it

Best source is Atlantean Worm Boss at 20.94% per kill — about 10 kills for a 9-in-10 chance.

SourceChance per killKills for 90%AmountNote
Atlantean Worm Boss20.94%
101guaranteed group

Crafting

IngredientAmount
Solarite Bar24

Crafting time 1s.

Internal name AtlantianWormSword. Components: AreaLevelAuthoring CooldownAuthoring DurabilityAuthoring EntityMonoBehaviourData GivesConditionsWhenEquippedAuthoring WeaponDamageAuthoring