Wierd Korean announcements and rewards?

I know this server is mostly played by Korean players, and you must type .eng in order to be able to see some text on English, but today i were hunting some mobs and they give me 'korean something' i can't see in my inventory. Then some text spawned and said: some text in korean, then (7500) then something else i couldn't understand. I still hunting same mobs, same area, and then at some point, another text spawned with some korean text and a (3).. and i got 3 n-zel. Like i did or complete a kind of achivement or so.

Can some one explain that to me? Could those text be translated for non-korean speakers.

Thanks in advance