ZanTeb is a magic Runeword created by combining a Zan Rune of Ritual and a Teb Rune of Invocation.
How to Create ZanTeb
You can create ZanTeb by adding the magic Zan Rune of Ritual and the magic Teb Rune of Invocation to a two-socketed Helm, Chest Armor, Pants, or Two-Handed Weapon.
Zan - Cast an Ultimate Skill. (150)
Teb - Invoke the Necromancer's , counterattacking damage from enemies and Healing you when they die. (100)
Abhorrent Iron Maiden
Overflow
ZanTeb can not overflow because the Teb Rune does not have an overflow effect.
Overflow occurs when your Ritual generates more Offering than required for the Invocation. The overflow effect is proportional to the amount Offering overflows.