ZanMot is a rare Runeword created by combining a Zan Rune of Ritual and a Mot Rune of Invocation.
How to Create ZanMot
You can create ZanMot by adding the magic Zan Rune of Ritual and the rare Mot Rune of Invocation to a two-socketed Helm, Chest Armor, Pants, or Two-Handed Weapon.
Zan - Cast an Ultimate Skill. (150)
Mot - Gain 1 |4 shadow:shadows;, from the Rogue's , reducing damage taken per shadow. (150)
Dark Shroud
Overflow
ZanMot can not overflow because the amount of Offering you receive from the Zan 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.