Built by the Zhentarim Association, the Mage Tower garrisoned in the Underground Cave was considered a small one. It had seven floors aboveground and two floors below, making it a building that consisted of nine floors.
It's worth noting that the structure of the building was also similar to the Swamp Tower which Leon had stayed before.
The first to third floors above the ground was a public area. They were open to all apprentice Mages, functioning as the main area of activity for them. The public facilities available for them covered nearly every field of study an apprentice could ever be involved in. On the other hand, the fourth to seventh floors were only available to official Mages, serving as their living quarters and a site for experimentations. If any apprentice intruded in these places without special permission, they would be mercilessly attacked by the defensive mechanisms of the Mage Tower.