Wasn't This Supposed to Be a World of Science?

As an ordinary high school student, Lu Guan had always believed in science.

That was until he took part in a special academy interview.

Lu Guan’s worldview completely collapsed.

Anomalous objects, mythical creatures, offspring of evil gods, and the divinely favored.

Someone translate this for me: what do you mean the gods have already fallen, and anomalies are about to reawaken???

And what the hell is this Beginner’s Guide to God-Slaying?