NocLac is a rare Runeword created by combining a Noc Rune of Ritual and a Lac Rune of Invocation.
How to Create NocLac
You can create NocLac by adding the rare Noc Rune of Ritual and the rare Lac 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)
Lac - Invoke the Barbarian's , taunting enemies and reducing your damage taken for 3 seconds. (400)
Challenging Shout
Overflow
NocLac can not overflow because the amount of Offering you receive from the Noc Rune exactly fills the required Offering of the Lac Rune.
Overflow occurs when your Ritual generates more Offering than required for the Invocation. The overflow effect is proportional to the amount Offering overflows.