Absolute Territory Field
The Absolute Territory Field, or AT Field for short, is a phenomenon that was discovered with the coming of the Jotun. To explain what it is would require several rooms full of scientists, mathematicians, and philosophers, in addition to several thousand whiteboards and enough markers to fill them all in.
To put it simply, the AT Field is the ability of one to exert their influence over reality itself, to make it their territory, where they can make the rules as they see fit despite what the universe proper may think. Some believe there must be patterns and logic to what can be done with an AT Field, while others ascribe to chaos theory on the subject and think anything and everything can be done with it. As of yet, it has barely been empirically proven that these things exist, much less what they can do.
The only thing that is known is that the Jotun are the unrivaled masters of this. Though humanity has found a way to harness the power itself, through the Aesir, it is a very haphazard method filled with flaws and which is only a fraction of what the Jotun are capable of. It still remains the most popular subject of debate since its inception, however, and is thought to be the future of humanity itself by many.