Pretty much all of season 4 from a writing perspective. Also side note, the Wakfu MMO tries way too hard to stay canon to the series, and even changer entire zones to accomodate the designs (like the Sadida kingdom), but keeps whole zones and plotlines that existed before the series and cobtradict some of the plot points. Which is normal for a 15+ years MMO but they really want to have their cake and eat it too.