ko rune

A Ko rune is a low tier rune that can be socketed into armor and weapons in Diablo 2: Lord of Destruction and Diablo 2 Resurrected. A Ko rune provides +10 to Dexterity when inserted in any item.

You can cube 3 Lum runes and a flawed amethyst together to get a Ko rune. You can also obtain a Ko rune from nightmare countess. You can get a Ko rune from the nightmare hellforge quest.

A Ko rune requires level 39 to use. When you socket an item with a Ko rune, you increase the level requirement to level 39, unless it was already higher.

Clvl 39
weapon+10 to Dexterityarmor/helm+10 to Dexterityshield+10 to Dexterity
rune sources

Countess:

nightmare and above

Hellforge:

nightmare

Treasure class:

act 2 (nm) good and above

Cube:

3 lum + flawed amethyst

Horadric cube recipes with ko runes

3x
ko runeko rune
+
flawed sapphireflawed sapphire
fal runefal rune
  • transmute exceptional unique armor, a ko rune, a lem rune, and a perfect diamond to create an elite unique armor of the same type

There are 10 runewords that contain a ko rune

list of all runewords in Diablo 2 made with a ko rune
Runeword
Sockets
Allowed BasesRuneword Recipe
Level
Stats
Harmony4 socketsmissile weapon
tir + ith + sol + ko
39
Level 10 Vigor Aura When Equipped+200-275% Enhanced Damage (varies)+9 To Minimum Damage (sol)+9 To Maximum Damage (ith)Adds 55-160 Fire DamageAdds 55-160 Lightning DamageAdds 55-160 Cold Damage+2-6 To Valkyrie (varies)+10 To Dexterity (ko)Regenerate Mana 20%+2 To Mana After Each Kill (tir)+2 To Light RadiusLevel 20 Revive (25 Charges)
Melody3 socketsmissile weapon
shael + ko + nef
39
+3 To Bow and Crossbow Skills (Amazon Only)+20% Increased Attack Speed (shael)+50% Enhanced Damage+300% Damage To Undead+3 To Slow Missiles (Amazon Only)+3 To Dodge (Amazon Only)+3 To Critical Strike (Amazon Only)Knockback (nef)+10 To Dexterity (ko)
Obedience5 socketspolearmspear
hel + ko + thul + eth + fal
41
30% Chance To Cast Level 21 Enchant When You Kill An Enemy+40% Faster Hit Recovery+370% Enhanced Damage-25% Target Defense (eth)Adds 3-14 Cold Damage (thul)-25% To Enemy Fire Resistance40% Chance of Crushing Blow+200-300 Defense (varies)+10 To Strength (fal)+10 To Dexterity (ko)All Resistances +20-30 (varies)Requirements -20% (hel)
Lawbringer3 socketshammersceptersword
amn + lem + ko
43
20% Chance To Cast Level 15 Decrepify On StrikingLevel 16-18 Sanctuary Aura When Equipped (varies)-50% Target DefenseAdds 150-210 Fire DamageAdds 130-180 Cold Damage7% Life Stolen Per Hit (amn)Slain Monsters Rest In Peace+200-250 Defense Vs. Missile (varies)+10 To Dexterity (ko)75% Extra Gold From Monsters (lem)
Voice of Reason4 socketsmacesword
lem + ko + el + eld
43
15% Chance To Cast Level 13 Frozen Orb On Striking18% Chance To Cast Level 20 Ice Blast On Striking+50 To Attack Rating (el)+220-350% Damage To Demons (varies)+355-375% Damage To Undead (varies) (eld)+50 To Attack Rating Against Undead (eld)Adds 100-220 Cold Damage-24% To Enemy Cold Resistance+10 To Dexterity (ko)Cannot Be Frozen75% Extra Gold From Monsters (lem)+1 To Light Radius (el)
Wealth3 socketsbody armor
lem + ko + tir
43
+10 to Dexterity (ko)+2 to Mana After Each Kill (tir)300% Extra Gold From Monsters (lem)100% Better Chance of Getting Magic Items
Sanctuary3 socketsshield
ko + ko + mal
49
+20% Faster Hit Recovery+20% Faster Block Rate20% Increased Chance of Blocking+130-160% Enhanced Defense (varies)+250 Defense vs. Missile+20 To Dexterity (ko)All Resistances +50-70 (varies)Magic Damage Reduced By 7 (mal)Level 12 Slow Missiles (60 Charges)
Rift4 socketspolearmscepter
hel + ko + lem + gul
53
20% Chance To Cast Level 16 Tornado On Striking16% Chance To Cast Level 21 Frozen Orb On Attack20% Bonus To Attack Rating (gul)Adds 160-250 Magic DamageAdds 60-180 Fire Damage+5-10 To All Attributes (varies)+10 To Dexterity (ko)38% Damage Taken Goes To Mana75% Extra Gold From Monsters (lem)Level 15 Iron Maiden (40 Charges)Requirements -20% (hel)
Heart of the Oak4 socketsstaffmace
ko + vex + pul + thul
55
+3 To All Skills+40% Faster Cast Rate+75% Damage To Demons (pul)+100 To Attack Rating Against Demons (pul)Adds 3-14 Cold Damage (thul)7% Mana Stolen Per Hit (vex)+10 To Dexterity (ko)Replenish Life +20Increase Maximum Mana 15%All Resistances +30-40 (varies)Level 4 Oak Sage (25 Charges)Level 14 Raven (60 Charges)
Destruction5 socketspolearmsword
vex + lo + ber + jah + ko
65
23% Chance To Cast Level 12 Volcano On Striking5% Chance To Cast Level 23 Molten Boulder On Striking100% Chance To Cast level 45 Meteor When You Die15% Chance To Cast Level 22 Nova On Attack+350% Enhanced DamageIgnore Target's Defense (jah)Adds 100-180 Magic Damage7% Mana Stolen Per Hit (vex)20% Chance Of Crushing Blow (ber)20% Deadly Strike (lo)Prevent Monster Heal+10 To Dexterity (ko)