Eld

If you look at the list of all runes, you can find out the cube recipes to create a rune of one level higher than Eld. Here are the Eld attributes:

Rank: (r2)
Weapon: +75% Damage vs. Undead, +50 Attack Rating vs. Undead *
Armor/Helm: Lowers Stamina drain by 15%
Shield: +7% Blocking
Ilvl/Clvl Required: 11

Runewords with Eld

Runeword	Stats	Comments	Active In
			1.11	1.10	1.09
Breath of the Dying VexHelElEldZodEth Vex (26) + Hel (15) + El (1) + Eld (2) + Zod (33) + Eth (5) All Weapons Clvl Required:	50% Chance To Cast Level 20 Poison Nova When You Kill An Enemy Indestructible +60% Increased Attack Speed +350-400% Enhanced Damage (varies) +200% Damage To Undead -25% Target Defense +50 To Attack Rating +50 To Attack Rating Against Undead 7% Mana Stolen Per Hit 12-15% Life Stolen Per Hit (varies) Prevent Monster Heal +30 To All Attributes +1 To Light Radius Requirements -20%	See it here.	Yes	Yes	No
Faith OhmJahLemEld Ohm (27) + Jah (31) + Lem (20) + Eld (2) Missile Weapons Clvl Required:	Level 12-15 Fanaticism Aura When Equipped (varies) +1-2 To All Skills (varies) +330% Enhanced Damage Ignore Target's Defense 300% Bonus To Attack Rating +75% Damage To Undead +50 To Attack Rating Against Undead +120 Fire Damage All Resistances +15 10% Reanimate As: Returned 75% Extra Gold From Monsters	Ladder Only	Yes	Yes	No
Principle RalGulEld Ral (8) + Gul (25) + Eld (2) Armor Clvl Required:	100% Chance To Cast Level 5 Holy Bolt On Striking +2 To Paladin Skill Levels 15% Slower Stamina Drain +5% To Maximum Poison Resist Fire Resist +30%	Paladin	Yes	No	No
Silence DolEldHelIstTirVex Dol (14) + Eld (2) + Hel (15) + Ist (24) + Tir (3) + Vex (26) All Weapons. Clvl Required: 55	+200% Enhanced Damage 175% Damage vs. Undead +50 to Attack Rating Against Undead 11% Mana Steal Hit Blinds Target (20) Faster Hit Recovery +2 to All Skills All Resistances +75 20% Increased Attack Speed +2 to Mana After Each Kill Hit Causes Monster to Flee 25% Requirements -20% 30% Better Magic Find	See it here.	Yes	Yes	Yes
Voice of Reason LemKoElEld Lem (20) + Ko (18) + El (1) + Eld (2) Maces & Swords Clvl Required:	15% Chance To Cast Level 13 Frozen Orb On Striking 18% Chance To Cast Level 20 Ice Blast On Striking +50 To Attack Rating +220-350% Damage To Demons +355-375% Damage To Undead (varies) +50 To Attack Rating Against Undead Adds 100-220 Cold Damage -24% To Enemy Cold Resistance +10 To Dexterity Cannot Be Frozen 75% Extra Gold From Monsters +1 To Light Radius	Ladder Only	Yes	Yes	No