GW2 GW2 Magellan’s Memento achievement guide with detailed walkthrough. Magellan’s Memento is a new explorer achievement obtained with the Halloween patch and is located on the SE corner of Frostgorge Sound. This achievement is fairly short and can be obtained solo if you are good at dodging red circles and can skip mobs.
Take the Arundon Waypoint at SE corner of Frostgorge Sound. From here, head NE towards the heart and then go SE once you reach the heart and look for a cave entrance.
Inside is a series of long tunnel with a couple of grawls. These grawls can be skipped and most likely won’t kill you. What you do have to watch out however, is the red circles on the ground. These red circles can almost instantly down you if you don’t dodge out of them.
Pretty soon, you will see Tattered Journals scattered on the ground. There are three volumes in total and the other two volumes can be obtained at the end.
You will need to defeat two veteran grawls guarding a makeshift gate to proceed further in the tunnel. At the end of the tunnel is a champion Giant Blue Ooze guarding a chest. Running towards will grant you the achievement!