Politics

Arial could listen to Amara telling him that he would be the savior of this people and become Asrana, a deity, a divine being whose destiny is to fight Darkness. 

He is fine with that. 

But he is also very pragmatic. Just because Amara said that he would get the Three kingdoms under his feet, did not mean he would just abandon reason

Unless he is given the power of a god today, enabling him to move mountain and split the sea, then he still have to use mortal means

He is almost unkillable in battle. But there is always a possibility. After all, in the end, he is still not an immortal. Almost unkillable did not mean he was unkillable.

It just means he is hard to kill.

  And there are also demons. Heavenly Demons as Amara called it. 

This demon is unlike the demons in Arakath. 

These Heavenly demons is ancient. They possess great magic and powerful physical abilities.

They could fight with dragons and gods and goddesses.