Knife of the Undermountain King

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Knife of the Undermountain King image

The Knife of the Undermountain King is a very rare +2 shortsword that increases the frequency of scoring Critical Hits and grants Advantage against enemies in the shadows.

Description Icon.png

Snatched from the realm of the mad wizard Halaster Blackoak, this knife became a prized keepsake of a duergar king.


D6 Piercing.png 1d6 + 2 (3~8) + Strength or Dexterity modifier Damage TypesPiercing damage
Shortswords Shortswords
Rarity: Very Rare
Enchantment: + 2
Finesse Finesse
Light (weapon property) Light
Dippable Dippable
 Melee: 1.5 m / 5  ft
 Weight: 0.9 kg / 1.8 lb
Price: 480 gp / 1200 gpHHonour
UID MAG_Duergar_Sword_KingsKnife
UUID 025e162a-45ec-4f4c-89da-04d8e8dfe606


The holder of this item gains:

Weapon actions

Proficiency Icon.png If you have proficiency, equip in main hand to gain:

Flourish Flourish ()

Feint an attack to possibly throw your opponent Off Balance Off Balance.

Piercing Strike Piercing Strike ()

Stab an enemy and possibly inflict Gaping Wounds Gaping Wounds.

Where to find

Can be bought or looted from A'jak'nir Jeera in Crèche Y'llek.


  • The effect Organ Rearranger stacks with other passive effects that improve critical chance, including ranged attacks and spell attack rolls [1][2].
  • The damage reroll is not applied to thrown attacks, including throwing the weapon itself.
  • The Shadow Blade passive granted by this weapon does not grant advantage against obscured targets, instead seeming to do nothing.[Hotfix 25]