Guardians

Guardians
Guardians are the protector of the world from both Traitors and magic beings that declares war against the World Order (e.g the Engelas).

The Guardians are powerful beings. They almost immune to all disease and magic effects. Their power comes from the current World Order's god, in the books' event, they're gaining from Karlinna.

Well-known Guardians: Azteran, the leader of the Mitrilinirs; Verdonu, the Mighty; Tenario, formerly in Jeretan and Tenarius.

How to kill a guardian
This question is beyond limits. They cannot be killed, but they can be banished to the godforsaken place of Nentar. Thus they become a Fallen. They are the absolute weak and they're failed their purpose of existence.

Artenius in the book of The Heavens, managed to kill with the help of a letter from Tisel Tirentin. Tirentin have knowledge of banishing a Mitrilinir, but this came from Isnari.