MoniXan is a legendary Runeword created by combining a Moni Rune of Ritual and a Xan Rune of Invocation.
How to Create MoniXan
You can create MoniXan by adding the magic Moni Rune of Ritual and the legendary Xan Rune of Invocation to a two-socketed Helm, Chest Armor, Pants, or Two-Handed Weapon.
Moni - Cast 2 Mobility or Macabre Skills. (100)
Xan - Your next Skill cast will be a guaranteed Critical Strike and Overpower. (700)
Overflow
MoniXan can not overflow because the amount of Offering you receive from the Moni 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.