Du You slapped his forehead: "I forgot, I've been busy killing monsters all along that I forgot normal animals are pretty weak. And these are just ordinary rats." After effortlessly killing these rats, Du You's tense mood unexpectedly relaxed a little.
If the monsters in these sewers all controlled such creatures, then his only real enemy might just be the unknown monster.
Continuing forward, thanks to the regeneration speed of the Cursed Crow, he could use the Feather Arrow technique provided that it wasn't too frequent. He didn't have to worry about going bald. The feather attacks used by the Cursed Crow King were more like feathers formed from energy.
The further he went, the more densely packed the rats became. Gradually, some mutated rats began to appear. After a round of Feather Arrows, Du You noticed some larger rats lying on the ground.