Catacombs

"The catacombs are some ancient series of caverns/tunnels beneath the main magic college that have existed as long as anyone remembers. They are not mapped and each tunnel on map is like 100 stories tall and the width of a city if i remember correctly. the passages are always collapsing with new ones being revealed. it doesn't help that the magic college test rituals they have found down their so if something goes wrong they can seal the room.  Interesting side note one ritual summoned fog hundreds of years before it appeared. If someone can find any links to where Dev's talked about it  please post anyone who knows more feel free to correct"

- Qoute from Aidan(EragonRagnold) on discord

(I don't know either)