Chapter 684 - Fighting Monsters
Livia and her teammates already came inside the inner area and were already fighting Monsters in that area. They already found some snake Monsters but those monsters were only Early Elite grade. This is the reason that they did not have any problem killing them even though currently they were facing almost 25 of those poisonous snake Monsters.
But still, you can say they are very careful about the poison of those Monsters. Even though those Monsters are weak compared to them, steel poison could harm them.
If you are wondering why they fight those weak monsters then the Monsters is the leader of that group, an intermediate Elite grade monster. They wanted to kill that Monster so they fought those Minions as the main Monster hiding right now.