XolTec is a legendary Runeword created by combining a Xol Rune of Ritual and a Tec Rune of Invocation.
How to Create XolTec
You can create XolTec by adding the legendary Xol Rune of Ritual and the magic Tec Rune of Invocation to a two-socketed Helm, Chest Armor, Pants, or Two-Handed Weapon.
Xol - Invoke a Skill from another Class. (150)
Tec - Invoke the Barbarian's Earthquake, dealing damage to enemies within. (100)
Overflow
When XolTec overflows, you receive the Tec Rune's overflow effect (Up to 100% Increased Radius) 0.5 times.
Overflow occurs when your Ritual generates more Offering than required for the Invocation. The overflow effect is proportional to the amount Offering overflows.