XolXal is a legendary Runeword created by combining a Xol Rune of Ritual and a Xal Rune of Invocation.
How to Create XolXal
You can create XolXal by adding the legendary Xol Rune of Ritual and the rare Xal Rune of Invocation to a two-socketed Helm, Chest Armor, Pants, or Two-Handed Weapon.
Xol - Invoke a Skill from another Class. (150)
Xal - Gain 20% Maximum Life for 6 seconds. (200)
Overflow
When XolXal overflows, you receive the Xal Rune's overflow effect (Increased Duration) 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.