The official ranking method of abyss gates due to magnitude was observed and published, of course, by the Executioners' Association according to the nine threat levels.
Abyss Gates were ranked from I to VI, where the increase in number signified the magnitude of dark energy distortion and expenditure. In other words, the stronger an abyss creature, the harder for them to invade Earth from God's Abyss, so whatever created the portal spent more effort.
Rank I was the classification of a gate that only produced dark energy enough for Weak and Strange abyss creatures to come through. These were the threat levels equivalent to the F and E grades, respectively.
Rank II Gates brought in the Mutated and Fallen abyss creatures, the threat levels equivalent to the D and C grades.
And of course, Rank III Gates brought in the Corrupted and Cursed abyss creatures, equivalent to the B and A grades.
