CirTal is a magic Runeword created by combining a Cir Rune of Ritual and a Tal Rune of Invocation.
How to Create CirTal
You can create CirTal by adding the magic Cir Rune of Ritual and the magic Tal Rune of Invocation to a two-socketed Helm,
Chest Armor,
Pants, or
Two-Handed Weapon.
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Overflow
When CirTal overflows, you receive the Tal Rune's overflow effect (Increased Swarms Spawned) 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.