CirLac is a rare Runeword created by combining a Cir Rune of Ritual and a Lac Rune of Invocation.
How to Create CirLac
You can create CirLac by adding the magic Cir Rune of Ritual and the rare Lac Rune of Invocation to a two-socketed Helm, Chest Armor, Pants, or Two-Handed Weapon.
Cir - Cast the same non-Channeled Skill 3 times in a row. (50)
Lac - Invoke the Barbarian's , taunting enemies and reducing your damage taken for 3 seconds. (400)
Challenging Shout
Overflow
CirLac can not overflow because the amount of Offering you receive from the Cir 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.