|Although this article is based on canonical information, the actual name of this subject is conjectural.|
- "Kali, Hera, Kronos, Thonic.
Air like nectar, thick as onyx.
Cassiel, by your second star,
Hold mine victim as in tar."
- ―Willow Rosenberg[src]
A powerful incantation that invoked a number of deities, it was meant to contain someone by turning the air around them as thick as tar. Willow used it in a battle against Glory, and it turned out to be strong enough to immobilize even the Hell-Goddess, who had until then seemed to be an unstoppable force.
This spell involved calling upon five Deities: Kali, Hera, Kronos, Thonic, and Cassiel. However, it was shown that the witch could later reactivate the spell without the need to re-invoke the Deities - instead, she would only need to say "thicken" along with a hand gesture.
It remains unknown as to how long this spell is able to contain its victim before the witch had to recite the invocation again.