In her 48+ hours in the city, Anna didn't find anything she was looking for... Be it zombies or level 2 animals, much less the so-called cannibals. But she noticed that in these 48 hours, her encounters with red-eyed creatures became more frequent...
It was a pattern; the zombies that seemed to be more instinctive and had red eyes were evolving. For the surviving humans, this was extremely bad news. If what she was looking for now was an even more intelligent zombie, then all the Jyreans were in trouble. It was then that she remembered the skill called crystal extraction. After easily killing a few zombies, Anna finally did some experiments and managed to extract these crystals.