"Eius causa discimus." What does that mean?
There were several stone tablets lining the walls in the corridors; maybe they'll prove useful?
Yes, the one on the right has the same words he was mumbling - and apparently has something behind it.
See if you can cut it loose. ?
Use your knife on the tablet.
Cutting that tablet revealed a secret key!
Geron seems to think it's magic.
Surprisingly, this key doesn't go into a door - look for any shallow locks in the courtyard outside the academy.
The hole in the ground looks awfully suspicious.
Putting the key into this strange ring has revealed a new puzzle.
Each of the symbols on the outer circle represent a different god.