Running game overnight help

[Art24]

I'm a returning player that has played a long time ago but I quit then, and now I'm getting back into it. I'm at the point where farming cards is good for my dps but I can't keep my computer/internet on overnight or whilst I am away, meaning I can only keep the game open for 10 hours at most each day which means I loose out on a lot of cards. Is there anyway to run the game overnight without usage of internet or computer on? Like a program or a virtual server, I have no idea, I've tried searching but found nothing and need help. Thanks