Sewers are really easy...
In the first floor you will just found those larvas... some familiars can be the worst thing you can found ^^
in the second floor are a lot more enemies but nothing hard... and the only agresives enemies are those familiar too... but you can found some mushroms and those kind of frogs (sorry...im not really sure about the oficial names of them)
in the third floor you can find more problems with some green agresives cockroachs... there are little cockroachs too...but they are easy...
that is the end of the sewers as i know...
In the first floor you will just found those larvas... some familiars can be the worst thing you can found ^^
in the second floor are a lot more enemies but nothing hard... and the only agresives enemies are those familiar too... but you can found some mushroms and those kind of frogs (sorry...im not really sure about the oficial names of them)
in the third floor you can find more problems with some green agresives cockroachs... there are little cockroachs too...but they are easy...
that is the end of the sewers as i know...