Hell Beast Matriarch
The devils are now experiencing pain directly to their soul which is only possible if the Kings of Hell themselves punish them. The Kings of Hell hold special power compared to the other devil nobility as they can permanently extinguish a devil. This is why the rules of Hell are followed when it comes to keeping things in order.
Only a few traitor devils are unfortunate though since only a small number of them have been erased from existence. The other devils that were traitorous just died and respawned back to the area they are from. This could not be avoided but this development is still better than nothing.
One of the top guilds' master's suddenly used a powerful attack that destroyed the magic circle that the Great Duke of Hell Aym. Granted that the magic circle was already losing effectiveness as the mana that was used by the Great Duke of Hell Aym is starting to run out, the attack is still something that is incredibly powerful to destroy a magic circle.