Little is known about Gnilda, beyond his association with Werdna, Ferda, and Lähdevesi. He is known to have been a talented architect and an avid reader and writer, and is acknowledged in the form of flattering statues even thousands of years after his presumed death for his contributions to libraries across The Basket.
He is also known to have had a hand in constructing the Wizards College, Hybrasil, and a labyrinthine dungeon known as the Proving Grounds.
Around the time of Werdna.
The party gained entry to the Werdna and the Herald of Annihilation, eventually making their way through the dungeon to find the specter of Gnilda.