KaaMet is a rare Runeword created by combining a Kaa Rune of Ritual and a Met Rune of Invocation.
How to Create KaaMet
You can create KaaMet by adding the rare Kaa Rune of Ritual and the magic Met Rune of Invocation to a two-socketed Helm, Chest Armor, Pants, or Two-Handed Weapon.
Kaa - Lose 25% of your Maximum Life. (50)
Met - You leave the Necromancer's Desecrated Ground behind you for 3 seconds, dealing damage to enemies within. (100)
Overflow
KaaMet can not overflow because the amount of Offering you receive from the Kaa Rune exactly fills the required Offering of the Met Rune.
Overflow occurs when your Ritual generates more Offering than required for the Invocation. The overflow effect is proportional to the amount Offering overflows.