KaaXal is a rare Runeword created by combining a Kaa Rune of Ritual and a Xal Rune of Invocation.
How to Create KaaXal
You can create KaaXal by adding the rare Kaa Rune of Ritual and the rare Xal Rune of Invocation to a two-socketed Helm, Chest Armor, Pants, or Two-Handed Weapon.
Kaa - Lose 1% of your Maximum Life. (2)
Xal - Gain 20% Maximum Life for 4 seconds. (200)
Overflow
KaaXal can not overflow because the amount of Offering you receive from the Kaa Rune exactly fills the required Offering of the Xal Rune.
Overflow occurs when your Ritual generates more Offering than required for the Invocation. The overflow effect is proportional to the amount Offering overflows.