An Um rune is a mid tier rune that can be socketed into armor and weapons in Diablo 2: Lord of Destruction and Diablo 2 Resurrected. An Um rune provides All Resistances +20 when inserted in shields or off-hands, All Resistances +15 in body armor and headgear, and 25% Chance of Open Wounds in weapons.
You can cube 2 Pul runes and a flawed diamond together to get an Um rune. You can also obtain an Um rune from hell countess. You can get an Um rune from the nightmare hellforge quest.
An Um rune requires level 47 to use. When you socket an item with an Um rune, you increase the level requirement to level 47, unless it was already higher.
Horadric cube recipes with um runes
transmute exceptional rare weapon, a um rune, a fal rune, and a perfect sapphire to create an elite rare weapon of the same type
There are 11 runewords that contain an um rune
|Allowed Bases||Runeword Recipe|
|Bone||3 sockets||body armor||47|
|Crescent Moon||3 sockets||axe, polearm, sword||47|
10% Chance To Cast Level 17 Chain Lightning On Striking7% Chance To Cast Level 13 Static Field On Striking+20% Increased Attack Speed (shael)+180-220% Enhanced Damage (varies)Ignore Target's Defense-35% To Enemy Lightning Resistance25% Chance of Open Wounds (um)+9-11 Magic Absorb (varies)+2 To Mana After Each Kill (tir)Level 18 Summon Spirit Wolf (30 Charges)
|Duress||3 sockets||body armor||47|
|Gloom||3 sockets||body armor||47|
|Stone||4 sockets||body armor||47|
|Kingslayer||4 sockets||sword, axe||53|
|Beast||5 sockets||axe, hammer, scepter||63|
Level 9 Fanaticism Aura When Equipped+40% Increased Attack Speed+240-270% Enhanced Damage (varies)20% Chance of Crushing Blow (ber)25% Chance of Open Wounds (um)+3 To Werebear+3 To LycanthropyPrevent Monster Heal (mal)+25-40 To Strength (varies)+10 To Energy (lum)+2 To Mana After Each Kill (tir)Level 13 Summon Grizzly (5 Charges)
|Chains of Honor||4 sockets||body armor||63|
|Doom||5 sockets||axe, hammer, polearm||67|
5% Chance To Cast Level 18 Volcano On StrikingLevel 12 Holy Freeze Aura When Equipped+2 To All Skills+45% Increased Attack Speed+330-370% Enhanced Damage (varies) (ohm)-40-60% To Enemy Cold Resistance (varies)20% Deadly Strike (lo)25% Chance of Open Wounds (um)Prevent Monster HealFreezes Target +3 (cham)Requirements -20% (hel)
|Plague||3 sockets||sword, claw, dagger||67|
25% Chance to Cast Level 15 Poison Nova On Striking20% Chance to Cast Level 12 Lower Resist When StruckLevel 13-17 Cleansing Aura When Equipped (varies)+1-2 All Skills+20% Increased Attack Speed (shael)+220-320% Enhanced Damage (varies)-23% To Enemy Poison Resistance0.3% (0-29.7) Deadly Strike (Based on Character Level)25% Chance of Open Wounds (um)Freezes Target +3 (cham)