Stank (magic)

"Centuries ago, a great war was waged between good and evil, between Ninja and Sorcerer, too powerful to destroy. The Dark One was locked deep underground, his prison sealed with a sacred stone. In the darkness he waits, wreaking havoc, possessing the vulnerable using that which they hold most dear, amassing power from chaos. Once he gains enough power, he will escape and darkness will reign. Preventing this is the sacred duty of the Ninja."

- Excerpt from the NinjaNomicon

Stank is a form of dark magic used by the Sorcerer in the Disney XD series Randy Cunningham: 9th Grade Ninja. It appears as a concentrated, chaotic mist that transforms the vulnerable into violent, aggressive monsters.

Main Ability
The power of the Stank seems to come from Chaos Pearls, which are worn as a belt by the Sorcerer. The pearls are powered by those who are either weak-willed, brokenhearted, or are going through a moment of great emotional trauma. The Stank takes hold of that which a victim holds most dear. Whatever the victim holds dear can be an object, like a hat or an instrument, but it can also be abstract, like a relationship or losing a competition.

If enough victims become possessed by the Stank, the Sorcerer's Chaos Pearls will gain enough energy to release him from his prison under Norrisville High. It's revealed in "Sorcerer in Love" and "Randy Cunningham: 13th Century Ninja" that once freed, the Sorcerer is able to use Stank with free will to possess anyone he chooses.

The one way to revert Stanked victims back to normal is by destroying whatever the Stank has possessed. Upon the victim reverting to normal, the Stank returns to the Sorcerer.

Other Uses

 * In "Sorcerer in Love" and "Randy Cunningham: 13th Century Ninja", it's shown that the Sorcerer can use the Stank to create blasts of pure energy to shoot at anything for destruction or fighting.
 * As revealed in "Randy Cunningham: 13th Century Ninja", the Sorcerer is able to create a projection of himself from Stank to control in order to fight others.
 * If enough people are Stanked, a Stanknado starts forming over the school, as seen in "Lucius O'Thunderpunch" and shown in the NinjaNomicon in "Stanks Like Teen Spirit".