Shadow Fox (그림자 여우, "Geulimja Yeou") is an orange fox Shinheuh controlled by Lo Po Bia Alphine. The Shadow Fox connects itself to some part of its targets' shadows in certain places, and once connected, the Shadow Fox become immune to their attacks. Alphine can command the Shadow Fox to drains shinsu in the body of whoever's shadow it has connected to until they die.[1]
Baam tried to attack the Shadow Fox with 3 shinsu Baangs, but the attack didn't work, because it's literally same as attacking "shadow", it's useless. The Shadow Fox killed Yukan after it bite him and drained the shinsu in his body.[1]