LithObr is a legendary Runeword created by combining a Lith Rune of Ritual and a Obr Rune of Invocation.
How to Create LithObr
You can create LithObr by adding the legendary Lith Rune of Ritual and the rare Obr Rune of Invocation to a two-socketed
Helm,
Chest Armor,
Pants, or
Two-Handed Weapon.
Overflow
LithObr can not overflow because the amount of Offering you receive from the Lith Rune exactly fills the required Offering of the Obr Rune.
Overflow occurs when your Ritual generates more Offering than required for the Invocation. The overflow effect is proportional to the amount Offering overflows.