CemMet is a magic Runeword created by combining a Cem Rune of Ritual and a Met Rune of Invocation.
How to Create CemMet
You can create CemMet by adding the magic Cem Rune of Ritual and the magic Met Rune of Invocation to a two-socketed Helm, Chest Armor, Pants, or Two-Handed Weapon.
Cem - Cast Evade. (75)
Met - You leave the Necromancer's Desecrated Ground behind you for 3 seconds, dealing damage to enemies within. (100)
Overflow
When CemMet overflows, you receive the Met Rune's overflow effect (Increased Duration) 0.5 times.
Overflow occurs when your Ritual generates more Offering than required for the Invocation. The overflow effect is proportional to the amount Offering overflows.