XolNer is a legendary Runeword created by combining a Xol Rune of Ritual and a Ner Rune of Invocation.
How to Create XolNer
You can create XolNer by adding the legendary Xol Rune of Ritual and the rare Ner Rune of Invocation to a two-socketed Helm, Chest Armor, Pants, or Two-Handed Weapon.
Xol - Invoke a Skill from another Class. (150)
Ner - Invoke the Rogue's for 5 seconds, gaining Dodge Chance, Movement Speed, Unstoppable, and Stealth. (600)
Countering Concealment
Overflow
XolNer can not overflow because the amount of Offering you receive from the Xol Rune exactly fills the required Offering of the Ner Rune.
Overflow occurs when your Ritual generates more Offering than required for the Invocation. The overflow effect is proportional to the amount Offering overflows.