TamMot is a legendary Runeword created by combining a Tam Rune of Ritual and a Mot Rune of Invocation.
How to Create TamMot
You can create TamMot by adding the legendary Tam Rune of Ritual and the rare Mot Rune of Invocation to a two-socketed Helm, Chest Armor, Pants, or Two-Handed Weapon.
Tam - Cast a non-Channeled Core Skill. (25)
Mot - Gain a shadow from the Rogue's , reducing damage taken per shadow. (150)
Dark Shroud
Overflow
TamMot can not overflow because the amount of Offering you receive from the Tam 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.