Insane Kid's wacky dreams

Small piece came back to me. I recall the dream being really long and this was near the end, but I can't really recall the rest of the dream. All I recall is that it was me with some friend (not a real-life friend) who both had been enslaved by this evil guy. We were in a large, sort of room, it was shaped like a lima bean with walls a good 20 feet high, however no ceiling. It was nighttime and you could see the stars through the roof. We weren't the only slaves there, the room was packed with other people enslaved. In these dream the world supposedly had magic that was quite common for people to use, but we were enslaved because the guy found some way to remove our magical abilities. Anyway, don't remember exactly what happened, but some elite force of mages (don't remember what the group was called, but there was 7 or so people in the group) showed up and managed to free us.

It is quite foggy, don't remember it real well, and as said this was near the end.