someone else may have already posted on this same hack, so in that case credit would go to them.
You need cheat engine 6.0:
first open cheat engine and grand chase, then attach cheat engine to it(colored computer in top corner)
now follow these steps:
1.Go to practice mode and choose Ronan.
2.un-check fast scan in cheat engine and type 16256 in the scan box and press enter/click first scan. You should get a lot of addresses in the box to the left.
3.Use Holy Bless(1st white magic skill)
4.Type 16281 in the box and press enter or next scan
5. Click the address there should only be one.
6.Change the value to 18000-20000 and freeze it.
This only works while your the room master or it will go to whoever the room master is.