Schematic: Viperid Menace
Schematic: Viperid Menace drops from the treasure Library Vault located inside Lexical Grotto.
To open the treasure you have to interact with the correct tablet inside the 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 59,1, 81,8 cave entrance
/way 57,9, 78,9 correct tablet to interact
/way 58,8, 77,2 Library Vault
None the Wiser Guild 