ZanNer is a rare Runeword created by combining a Zan Rune of Ritual and a Ner Rune of Invocation.
How to Create ZanNer
You can create ZanNer by adding the magic Zan Rune of Ritual and the rare Ner Rune of Invocation to a two-socketed Helm, Chest Armor, Pants, or Two-Handed Weapon.
Zan - Cast an Ultimate Skill. (150)
Ner - Invoke the Rogue's for 5 seconds, gaining Dodge Chance, Movement Speed, Unstoppable, and Stealth. (600)
Countering Concealment
Overflow
ZanNer can not overflow because the amount of Offering you receive from the Zan 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.