I was CPQing when all of a sudden one of my fellow party members starts attacking the whole map with his cygnus skills, I start confronting him saying hes obviously hacking and he says that he has done this a few times before on different accounts and got banned, and that he started his lv 47 character today. Then I proceed to call him a hacker and he starts claiming its a glitch that Nexon thinks is a hack, but admits that they ban people for abusing this glitch and/or hack. Please ban this reet as he sickens me.

This is a hack, however, these forums aren't the place to report players, as anything posted here will not reach anyone who can deal with bannings and the like.

You're going to need to log a ticket with links to these screenshots.

To log a ticket click the support button at the top of this page.

You may be asked to log in depending on when you last logged on to the Nexon website.

On the next page, you should see a Log a Ticket button. 

Click this and then fill in your ticket.