QS SV nay combo kill bi loi, ko tang dame khi su dung combo, thi vu , killl lv 1 da co 2 kill, do la 2 kill de combo khi dat den muc combo cao nhat la muc 5, thi xuat kill 55 77 88 94 97 bat ky kill nao cung phai tang x5 cho dame kill do thi moi la QS dung chuan