Even when suppressed by the Anti-Magic Field, an Eighth Rank Demon is still of the Eighth Rank, its mere physical body is enough to drive ordinary enemies to Despair.
In a way, perhaps the Anti-Magic Field is a sort of enhancement for this demon, as the Anti-Magic Field literally means invulnerable to all spells, which, once activated, could indeed highlight the physical advantage of the demon to the greatest extent.
But...
Lin Helou is also of the Eighth Rank, a Martial Artist who has transcended to a Saint. The Anti-Magic Field, although it also suppresses his True Qi, allows him to retain the most Combat Power by combining his well-honed physique with his exquisite Martial Arts, under the circumstance where both parties are equally weakened.
And there's also an Eighth Rank Dragon Disciple Guard, even holding a Divine Sword that is not suppressed by the Anti-Magic Field!