Ein and Aurora's dungeons were like two sides of a coin. While Ein was ruling over the above-ground area, Aurora was the uncontested owner of everything underground. As their dungeons were pretty close to each other, there were even stairs connecting her dungeon to Ein's.
Nobody uses it much, though, as it would take a long time to descend before you could reach the end of the spiral staircase. Not only was it tiring, but it would even make you a little dizzy walking a full kilometer down with the scenery endlessly repeating as if in a loop.
"... I should've asked Sandra or the other dragonkins to teleport me instead." Ein sighed as he finally reached the bottom and met with large double doors that were seemingly as sturdy as a castle wall.
