What’s your prison?

In this context “prison” refers to a grind that no matter how helpless it seems you are refusing to give up? I know many irons end up dry at the Red Prison that is CG and for many cute noobs the prison is trying to convince mom to give you her credit card number to buy gold. What’s your grind that no matter how helpless it seems you keep going and refusing to give up? I’m 700+ KC at Sire with only 2 unsired drops and only 1 bludgeon piece.