The carnage in the relic resulted not only from the hunting of millions of zombies but primarily from the mutual killings among the mutant beasts. However, everything had its pros and cons. Many creatures died, but the average evolutionary level of the remaining ones increased. After all, even in death, their flesh remained.
However, due to the extraction of Crystal Core power, the evolutionary ranks of the mutant beasts were not particularly high. The biggest beneficiary of this was the zombies.
During this brutal fighting, Shaun suffered heavy losses as well because he had split his teams to achieve the quickest extermination efficiency. The zombie horde would fight relentlessly whenever they encountered mutant beasts without any hesitation.