In Elden Ring, what item is needed to enter the Academy of Raya Lucaria?

In Elden Ring, the Academy Glintstone Key is needed to enter the Academy of Raya Lucaria.

The academy stands on an island in the middle of Liurnia of the Lakes and is protected by a magical seal at its southern entrance. The player must find an Academy Glintstone Key to pass through that seal. The key’s location is associated with a Glintstone Dragon guarding the area west of the academy, although the dragon does not need to be defeated to obtain it.

A second Academy Glintstone Key can be found inside the academy. That extra key is used in a quest involving Thops, a former student who wants to return to Raya Lucaria. Giving it to him advances his story, while the first key opens the academy gate.

The key is not the same as a Golden Seed, Stonesword Key, or any of the academy’s magical sorceries. Raya Lucaria is a major legacy dungeon and the main story location associated with the game’s sorcerer-queen, Rennala.