Azriel's Strength.

"That being is a monster far beyond what any of you can imagine." 

The Ethereal being spoke with a solemn look on his face. Then, he tried to explain it with words, 

"That being has a special connection with this world, he is one with the world, as long as he exists, this world can never be destroyed and if he wills it, this world will stop giving any type of support to anything or any being of this world. 

In this world, he is no different than a God.

He can pretty much kill anyone in this world with just his mere thought.

It is a very special connection that basically no world forms with any of its denizens, so his case is quite rare. 

It means that this world trusts him quite a lot and is entirely reliant on it."