u need to dig up Tol'Vir Fragments: choose the Botbase, check if automatically resolve artifacts is checked, start the bot on Kalimdor, and just wait.
U can't only dig up Tol'Vir Fragments because there is a maximum of 4 digsites per continent and u have to clear a digsite to get a new one.
so u'll find a lot of other artifacts u just have to be patient.