Open gc then wait for the login screen,then open cheat engine 6.0 then select main exe,then login and go to practice mode. Choose Ronan as ur char then when ur battling ur opponent,go back to cheat engine then type 16256 then click first scan. After doing that go back to grand chase then make Ronan use holy bless. After that go back to cheat engine then type 16281 then click Next scan there should be an address at the left side click on it then click on the red arrow then the address would be moved to the bottom of cheat engine double click the value(16281)then change it to 20000 then on the left side of the address click on the box it will then put an X on the box. Go back to grand chase then do any dungeon u like ur damage will be 99999. Hope this helps if this helps click on thanks.
Oh yea I almost forgot when ur on cheat engine u MUST uncheck fast scan