UrOhm is a legendary Runeword created by combining a Ur Rune of Ritual and a Ohm Rune of Invocation.
How to Create UrOhm
You can create UrOhm by adding the magic Ur Rune of Ritual and the legendary Ohm Rune of Invocation to a two-socketed Helm, Chest Armor, Pants, or Two-Handed Weapon.
Ur - Your Minion or Companion kills an enemy or dies. (10)
Ohm - Invoke the Barbarian's , increasing your damage dealt by 15% for 6 seconds. (600)
War Cry
Overflow
UrOhm can not overflow because the amount of Offering you receive from the Ur Rune exactly fills the required Offering of the Ohm Rune.
Overflow occurs when your Ritual generates more Offering than required for the Invocation. The overflow effect is proportional to the amount Offering overflows.