Conjuration

"(...) They can create things out of thin air, things as real as you and me, and make them vanish just as quick."

- Bobby explaining the Tricksters' ability of conjuration to Sam and Dean

Conjuration is the power to create or to uncreate something or someone from nothing. This is a very rare, and, if used correctly, powerful ability.

How powerful a being's ability to conjure things differentiates based on their over all power. Archangels, such as Gabriel, can literally create entire worlds, planets, galaxies, dimensions, and universes with the snap of their fingers. Witches, on the other hand, have never been seen conjuring much more than a few insects at a time.

Unlimited Users
These beings can create, uncreate, alter, bend, and control reality to an unlimited extent.
 * God - He created the entire universe and practically everything residing in it. He created Archangels, Angels, Leviathans, Hellhounds, Deities, Humans and their Souls, and even worlds and dimensions like Heaven, Earth, Purgatory, and Hell. He also created the immensely powerful Equalizer, a gun capable of killing nearly anything, with little effort.
 * Metatron '''- Metatron could create atomic matter (bowling alley and alcohol) and grace.
 * Jack Kline - In Jack in the Box, Jack was able to make worms appear inside Pastor Ames' body.
 * Archangels - They are even infinitely more skilled with this power than Trickster Gods. Gabriel was able to play with reality and bend it to his will. They can create entire universes with a snap of his fingers.

Advanced Users
These beings can create, uncreate and bend reality to an immense extent, however they are still very far below the top tier.
 * Jesse Turner - Extremely adept at this ability. Can create anything out of thin air and make anything come into existence just by believing it.
 * Deities - Calliope was capable of creating creatures based on characters and props from plays and urban legends to do her bidding, specifically to stop others from preventing plays from going on stage. She created a the scarecrow to kidnap the drama teacher and a student named Maggie wanted to stop the Supernatural Musical.
 * Tricksters - Can literally create anything out of thin air, and uncreate it just as fast. Gabriel, while masquerading as Loki, was responsible for several constructs. Loki was able to conjure a realistic projection of himself to interact with Dean Winchester. Though Dean could not harm it, the projection could harm Dean. However, though, Tricksters are
 * Eve - She was the progenitor of all monsters linked to Purgatory, even after her death, her vessel continued to produce monster eggs.

Moderate Users
These beings can create, uncreate and bend reality to a mediocre extent.
 * Callie Garrison - She could conjure objects and characteristics of humans to fit certain stories.
 * Howard - Can create creatures with fear-based magic.

Lower Users
These beings can create, uncreate and bend reality to a lower extent.
 * Witches - Witches can conjure maggots, blood or organs to appear on places or objects like food. The Wizard of Oz was able to conjure ropes and restrain Sam.
 * Acheri - A type of demon who can materialize their own bodies without the need of vessels.
 * Horsemen - Cosmic beings who can materialize constructs without the need of vessels.

Trivia

 * The Darkness said she was able to create a new reality where everyone was blissful forever, but never showed this.