NocMot is a rare Runeword created by combining a Noc Rune of Ritual and a Mot Rune of Invocation.
How to Create NocMot
You can create NocMot by adding the rare Noc Rune of Ritual and the rare Mot Rune of Invocation to a two-socketed Helm, Chest Armor, Pants, or Two-Handed Weapon.
Noc - Inflict a Crowd Control that isn't Slow or Chill. (10)
Mot - Gain 1 |4 shadow:shadows;, from the Rogue's , reducing damage taken per shadow. (150)
Dark Shroud
Overflow
NocMot can not overflow because the amount of Offering you receive from the Noc Rune exactly fills the required Offering of the Mot Rune.
Overflow occurs when your Ritual generates more Offering than required for the Invocation. The overflow effect is proportional to the amount Offering overflows.