KaaNer is a rare Runeword created by combining a Kaa Rune of Ritual and a Ner Rune of Invocation.
How to Create KaaNer
You can create KaaNer by adding the rare Kaa Rune of Ritual and the rare Ner Rune of Invocation to a two-socketed Helm, Chest Armor, Pants, or Two-Handed Weapon.
Kaa - Lose 25% of your Maximum Life. (50)
Ner - Invoke the Rogue's for 5 seconds, gaining Dodge Chance, Movement Speed, Unstoppable, and Stealth. (600)
Countering Concealment
Overflow
KaaNer can not overflow because the amount of Offering you receive from the Kaa 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.