CirXan is a legendary Runeword created by combining a Cir Rune of Ritual and a Xan Rune of Invocation.
How to Create CirXan
You can create CirXan by adding the magic Cir Rune of Ritual and the legendary Xan Rune of Invocation to a two-socketed Helm,
Chest Armor,
Pants, or
Two-Handed Weapon.


Overflow
CirXan can not overflow because the amount of Offering you receive from the Cir Rune exactly fills the required Offering of the Xan Rune.
Overflow occurs when your Ritual generates more Offering than required for the Invocation. The overflow effect is proportional to the amount Offering overflows.