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