User blog comment:BarrelHornet3/Finally! Gransys 3-stars/@comment-35117587-20180326214233

Thanks! I just got my 3rd star for Gransys by wandering the Miasmic Haunt at night. Just for context and for the sake of others out there, I had explored the entire overworld first (every camp and hidden cave to completely reveal the map) then I visited all the locations in this blog post here again (turns out I missed one). After doing those two things the 3rd star only became available by literally walking around the shore of the Miasmic Haunt and then walking around the island itself at night. It took a while and you need to be patient, in my case it took 3 wanderings at night to unlock it. Also it would seem that the rumors about needing to explore post-dragon isn't true because I got it pre-dragon in first playthrough.