LithZec is a legendary Runeword created by combining a Lith Rune of Ritual and a Zec Rune of Invocation.
How to Create LithZec
You can create LithZec by adding the legendary Lith Rune of Ritual and the rare Zec 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)
Zec - Reduce your active Ultimate Cooldown by 2 seconds. (200)
Overflow
LithZec can not overflow because the amount of Offering you receive from the Lith Rune exactly fills the required Offering of the Zec Rune.
Overflow occurs when your Ritual generates more Offering than required for the Invocation. The overflow effect is proportional to the amount Offering overflows.