If he wipes out atleast 10% of that horde (likely way more), he should definately be given some badass nickname and the highest adventurer rank possible, without forcing him to accept recommended quests specifically demanded of him.
I want to complain about the cliffhanger, but I can hardly do that if it's the end of a 60-pages chapter. I thought two times before the end while reading this "Now comes the cliffhanger end!" and it didn't, so yeah...I take that.
@icarushector: "UM THERE IS A PROBLEM HE FAILED TO NOTICE
He fired one fireball at the shield, which transferred a fireball to EACH OF THE SLIMES.