talk to goldenstrike (golden laying cat on brambleclan territory) then go back to sparrowtail talk to her then go to goldenstrike once again after that go down to the coldstone and talk to the light yellow she cat then go back to fireclan and go down to the space below the cave then keep walking right until you come to the clearing with sparrowtail talk to her and there you go. also for nightmares talk to hawkfeather then keep talking to beestripe ( golden and black she cat on fallenclan territory) after that talk to hawkfeather again and then go to the farm and talk to the she-cat then go back to hawkfeather and theres your achievement