Library Vault
The Library Vault is located in Zereth Mortis at 58.84 77.07 inside a cave called Lexical Grotto which it’s entrance is at 59.17 81.61.
It contains the Schematic: Viperid Menace.
To be able to see the Library Vault you need to have the Protoform Synthesis (Battle Pet) unlocked, which you can get after researching Dealic Understanding from the Cypher Research.
Treasure is located in Zereth Mortis Lexical Glade cave.
The chest it locked inside of the cave, to unlock it it you have to press the right tablet
which can be found in the top left corner from the entrance perspective.
/way 58.84 77.15 Library Vault
/way 58.96 81.88 Lexical Glade Entrance
/way 57.88 78.90 Tablet
None the Wiser Guild 