The barrier around the headquarters was about to be broken. It's been 1 hour since those people inside the headquarters are unable to go outside.
At that time they can already see the destruction appearing in that city and also notice those enemies appear there.
Unfortunately as most of them are present inside the headquarters and there are only two legendary grade Abyss humans present outside that place, it is literally a disadvantage for the Abyss humans.
Almost 2,000 Abyss humans were killed by those enemies. There are many injured Abyss humans. One legendary grade Abyss human was also killed by those enemies.
If you are wondering why Sam and the others are unable to kill more of those Abyss humans, then it is because of the demon core.
It looks like the demon core is also protecting those people. The demonic energy already increases around that place and somehow all those Abyss humans regenerate quickly.
