A Lum 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 Lum rune provides +10 to Energy when inserted in any item.
Lum runes are most often used for upgrading exceptional elite weapons to elite unique weapons.
You can cube 3 Io runes and a flawed topaz together to get a Lum rune. You can also obtain a Lum rune from nightmare countess. You can get a Lum rune from the nightmare hellforge quest.
A Lum rune requires level 37 to use. When you socket an item with a Lum rune, you increase the level requirement to level 37, unless it was already higher.
Nightmare and above
Act 2 (N) Good
3 Io Rune + Flawed Topaz
Horadric cube recipes with lum runes
A Lum rune will drop from TC Runes 9, which is accessed through Runes 10 or Act 2 (N) Good. Learn more about Treasure Classes here.
Act 2 (N) Good
There are 9 runewords that contain a lum rune
|Allowed Bases||Runeword Recipe|
|Splendor||2 sockets||any shield||37|
|Oath||4 sockets||sword, axe, mace||49|
Indestructible30% Chance To Cast Level 20 Bone Spirit On Striking+50% Increased Attack Speed (shael)+210-340% Enhanced Damage (varies)+75% Damage To Demons (pul)+100 To Attack Rating Against Demons (pul)Prevent Monster Heal (mal)+10 To Energy (lum)+10-15 Magic Absorb (varies)Level 16 Heart of Wolverine (20 Charges)Level 17 Iron Golem (14 Charges)
|Beast||5 sockets||axe, scepter, hammer||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)
|Wrath||4 sockets||missile weapon||63|
30% Chance To Cast Level 1 Decrepify On Striking5% Chance To Cast Level 10 Life Tap On Striking+375% Damage To Demons (pul)+100 To Attack Rating Against Demons (pul)+250-300% Damage To Undead (varies)Adds 85-120 Magic DamageAdds 41-240 Lightning Damage20% Chance of Crushing Blow (ber)Prevent Monster Heal (mal)+10 To Energy (lum)Cannot Be Frozen
Indestructible (zod)24% Chance to cast level 10 Weaken when struck+4 To All Skills+65% Faster Cast Rate+60% Faster Hit RecoveryKnockback (nef)+10 To Vitality (io)+10 To Energy (lum)Increase Maximum Life 15-25% (varies)Regenerate Mana 15-30% (varies)All Resistances +60-70 (varies)75% Extra Gold from Monsters (lem)30% Better Chance of Getting Magic Items (ist)