LithVex is a legendary Runeword created by combining a Lith Rune of Ritual and a Vex Rune of Invocation.
How to Create LithVex
You can create LithVex by adding the legendary Lith Rune of Ritual and the legendary Vex Rune of Invocation to a two-socketed Helm, Chest Armor, Pants, or Two-Handed Weapon.
Lith - Stand still while fighting for 0.31 seconds. (25)
Vex - Gain +3 to all Skills for 7 seconds. (1000)
Overflow
LithVex can not overflow because the amount of Offering you receive from the Lith Rune exactly fills the required Offering of the Vex Rune.
Overflow occurs when your Ritual generates more Offering than required for the Invocation. The overflow effect is proportional to the amount Offering overflows.