CirLum is a magic Runeword created by combining a Cir Rune of Ritual and a Lum Rune of Invocation.
How to Create CirLum
You can create CirLum by adding the magic Cir Rune of Ritual and the magic Lum 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)
Lum - Restore 1 Primary Resource. (5)
Overflow
When CirLum overflows, you receive the Lum Rune's overflow effect (Increased Resource Restored) 9 times.
Overflow occurs when your Ritual generates more Offering than required for the Invocation. The overflow effect is proportional to the amount Offering overflows.