"It's the Chimera!!!" shouted someone, as the monstrous beast being was knocked back by the Monolith's barrier.
Before the first tribulation began, with the sacrifice of a few elite fighters, with Jennie among them, the firebirds were able to kill the Chimera that resided in the Abyss Pit located at the north.
This fact, coupled with the 'cleaning' the firebirds did beforehand, caused the threat factor of the Abyss creatures coming from the north to greatly lessened to a manageable point.
However, the same could not be said for the Abyss pit on the western side of the city, it inevitably ignored due to the lack of manpower. Luckily, the barrier provided by the Doomsday Pillar's Monolith could save the day.
Well, at least that had been the case, until the fifth day of the tribulation.
Does anyone want to guess what happened next?