User blog comment:B214/General Discussion/@comment-30924344-20170519192910/@comment-29963364-20170519201740

The Devils have the ability to "create/control" any phenomena/concept they can imagine (with some limitations). Their Demonic Power is the "fuel" for using this ability, but it can also be used in it's "raw state" to attack, defend, etc.

Common applications of using Demonic Power to "create/control" phenomena include:
 * Elemental Magic
 * Audio-Visual Communication Magic
 * Teleportation/Transportation Magic
 * Magic Bullets or Beams (raw Demonic Power "shot out" as bullets or beams)

There are some bloodlines of Devils that are able to "create/control" certain phenomena/concepts unique to them.

Examples:

Bael - Conceptual Manipulation: Destrucion
 * Sirzechs has mastered this to the point that he is an "Incarnation of Destruction."

Agares - Causation Manipulation: Time
 * Gaining the ability to control time. Although since we haven't seen it used yet, we don't know "how" it works.

Belial - Conceptual Manipulation: Worthlessness
 * Nullifying the abilities & qualities of beings or objects.

Phenex - Conceptual Manipulation: Phoenix
 * Gaining the abilities & qualities of a Phoenix.

Abaddon - Concept Manipulation - Hole(s)
 * Creating personal pocket-dimensions that can be accessed through "holes" made by the user.

What I think Ajuka has done is take this "create/controle concepts & phenomena" idea, and taken it to the extreme. Ajuka is a very analytical and systematic person, so it makes sense that he would view the world as a giant, super complex system that runs off of "invisible variables & equations." Ajuka took his "imagination" of calculations & equations and applied it to his Demonic Powers, enabling him to "create/control" the worlds phenomena & concepts as if it were all a "system."

Here's a simpler way to put it. Imagin that the world is a Game, and Ajuka made himself the Game Master.