I can make a speed hack, it's useless if I turn off anti-cheat because hacks like damage etc. validate the server, that's the reason why changing the value using Game Guardian always returns to the original value. The server validates whether the damage value is the same as the one stored by the server. If the value is different, it will return to following the server. I also have all the item IDs and can change the items and their selling prices. But it's useless if the server records them differently.