XolZec is a legendary Runeword created by combining a Xol Rune of Ritual and a Zec Rune of Invocation.
How to Create XolZec
You can create XolZec by adding the legendary Xol Rune of Ritual and the rare Zec Rune of Invocation to a two-socketed Helm, Chest Armor, Pants, or Two-Handed Weapon.
Xol - Invoke a Skill from another Class. (150)
Zec - Reduce your active Ultimate Cooldown by 2 seconds. (200)
Overflow
When XolZec overflows, you receive the Zec Rune's overflow effect (Further Reduced Cooldown) 0.5 times.
Overflow occurs when your Ritual generates more Offering than required for the Invocation. The overflow effect is proportional to the amount Offering overflows.