We've reached chapter 287 and Riser still has the weakling mentality... I can't understand why he hides everything instead of removing the weed and root in one fell swoop.
I think that he was damage coz he didnt actived his skill so he doesnt show all his skill and that is why he sigh knowing that he need all his skill to kill it. Maybe he would dispare for a bit and mysteriusly alot people would die...