After the introduction to Ravensthorpe and some other quest, you will be able to build the seer's hut. When this is done, you can start the quest chain in Asgard. Just follow every quest until you reach Jotunhem. Don't forget about the 2 missable wealth in this region
After completing all the quest in Asgard and Jotunheim you will be rewarded with this trophy. Not missable, but easily forgot for those who don't care much about secondary missions.