Talk:Kebiishi/@comment-138.75.225.252-20150806171735/@comment-26093926-20150806175134

Infecting a map relies on how many times you clear the boss node of the specific map. You need atleast 10 boss node clears to unlock Kebiishi for that map. I think it just coincides that at lv 30+ you start grinding a specific stage in order to level them up and ready them for the next one. As for the frequency of Kebiishi appearing after infecting the map, It all depends on your luck