MoniThul is a rare Runeword created by combining a Moni Rune of Ritual and a Thul Rune of Invocation.
How to Create MoniThul
You can create MoniThul by adding the magic Moni Rune of Ritual and the rare Thul Rune of Invocation to a two-socketed Helm, Chest Armor, Pants, or Two-Handed Weapon.
Moni - Cast a Skill after moving.
(Cooldown: 0.25 seconds) (25)
Thul - Invoke the Sorcerer's , inflicting Freeze and Vulnerable onto enemies. (400)
Mystical Frost Nova
Overflow
MoniThul can not overflow because the amount of Offering you receive from the Moni Rune exactly fills the required Offering of the Thul Rune.
Overflow occurs when your Ritual generates more Offering than required for the Invocation. The overflow effect is proportional to the amount Offering overflows.